FILE HISTORY
`US 5,094,543
`
`PATENT:
`INVENTORS:
`
`5,094,543
`Mursa, Laszlo
`
`TITLE:
`
`Paint mixing container
`
`APPLICATION
`NO:
`FILED:
`ISSUED:
`
`US1990519892A
`
`07 MAY 1990
`10 MAR 1992
`
`COMPILED:
`
`09 MAY 2014
`
`Saint-Gobain Exhibit 1020 Page 1
`
`

`

`/5094~547
`
`N IN
`
`I
`
`SERIAL
`NUMBER
`(Series
`o11987)
`
`S,"
`
`,oJJ 9
`
`M
`1
`PATE'IT DATE
`IMAR 10 1992
`I
`
`PATENI T
`NUMBER
`
`SERIAL NUMBER
`07/519,89.2
`
`FILING DATE CLASS
`366
`05107190
`
`SUBCLASS
`
`LASZLO MURZSA-KELOWNA, B.C., CANADA'
`
`**CONTINUING DATA********************-
`THIS APPLN IS A CIP"OF
`VERIFIED
`
`BEST COPY
`P,1i 4,qT26 1396o
`
`071216,776 07/08188
`
`**FOREIGNIPCT APOLICATIONS************ ..
`541:633-7
`/
`CANADA
`((- .//°
`VERIFIED
`
`07/08/87
`
`***** SMALL ENTITY *****
`
`Foreign priority claimed
`35 USC 119 conditions met
`and Acknowledged
`
`Verified and Acknowledged
`
`yes
`yesu
`
`no
`AS
`no
`FILED
`(Verified
`Examlners Initials '•
`
`CAX
`
`FILINtI F~E
`INIIEP.
`TOTAL
`STATE OR SHEETS
`RT1OI'4~YS
`STATE OR SHEETS TOTALI
`ATTORNEY'S
`INDEPi FILING FEE
`
`D OCKET NO.2
`CAXOUNY WS. CIs CLAIMS RECEIVED
`2 21 .00 MURPUS 000 2
`1 5
`
`3
`
`2 6
`
`DONALD.J.>BOBAK
`RENNER, KENNERi GREIVEP;BOBAK r "
`TAYLOR & WEBER
`-
`-
`1610 FIRST NATIONALTOWER j
`9
`AKRON, 0H.44308-1456
`
`I
`
`SPAINT MIXING CONTAINER/
`... . .. ._ _ _ __ _ ._ ._ _ _ .. ._- ..__ ._ "...
`... .6L (rev. 10-78)
`U.S. DEPT. of COMMePat. & TM Office- PTO-431
`
`F
`
`CERTIFICATE
`SEP 2 t 1995
`
`PARTS OF APPLICATION
`FILED SEPARATELY
`
`'
`
`NOTICE OF ALLOWANCE MAILED
`NO
`10saj ,
`
`C,
`Assistant Exa
`
`PREPARED OR SSU
`'
`
`Iner
`
`oceti
`
`"
`
`ISSUE FEE
`Date Paid p/
`
`Amount Due
`2 . 0
`
`Class
`
`.
`
`.*
`
`y
`,
`.
`'V.Soy Fa. s Exa.i'..
`u v, 41viSo v1 3 ... "' E i
`rl,,, "+
`Art Unit 242
`Primary Examiner
`ISSUE CLASSIFCATION
`Subclass
`
`Total Claims
`
`CLAIMS ALLOWED.-
`lalm
`Pr
`
`I
`
`SheetsDOwg
`
`DRAWING
`Fi
`rwg.
`
`PrilFi_
`
`3
`ISSUE
`BATCH
`NUMBER
`
`i
`
`I
`
`Label
`Area
`
`Form PTO.436A
`(Rev. 9186)
`
`WARNING: The Information disclosed herein may be restricted. Unauthorized disclosure may be
`prohibited by the United States Code Title 35, Sections 122, 181 and 368.
`Possession outside the U.S. Patent & Trademark Office is restricted to authorized employees
`and contractors only.
`
`Saint-Gobain Exhibit 1020 Page 2
`
`

`

`5,094,543
`
`PAINT MIXING CONTAINER
`
`Transaction History
`
`Transaction Description
`Date
`05-29-1990 Application Captured on Microfilm
`06-14-1990 Case Docketed to Examiner in GAU
`Information Disclosure Statement (IDS) Filed
`07-02-1990
`Information Disclosure Statement (IDS) Filed
`07-02-1990
`12-12-1990 Non-Final Rejection
`12-20-1990 Mail Non-Final Rejection
`Response after Non-Final Action
`03-21-1991
`Supplemental Papers - Oath or Declaration
`03-21-1991
`Incoming Letter Pertaining to the Drawings
`03-21-1991
`04-04-1991 Date Forwarded to Examiner
`Final Rejection
`05-21-1991
`06-04-1991 Mail Final Rejection (PTOL - 326)
`Preexamination Location Change
`06-13-1991
`Response after Final Action
`09-06-1991
`Request for Foreign Priority (Priority Papers May Be Included)
`09-06-1991
`Incoming Letter Pertaining to the Drawings
`09-06-1991
`09-12-1991 Date Forwarded to Examiner
`Examiner Interview Summary Record (PTOL - 413)
`11-12-1991
`11-15-1991 Mail Notice of Allowance
`11-15-1991 Notice of Allowance Data Verification Completed
`Issue Fee Payment Verified
`12-13-1991
`Issue Notification Mailed
`02-03-1992
`03-10-1992 Recordation of Patent Grant Mailed
`Post Issue Communication - Certificate of Correction
`08-23-1993
`
`Saint-Gobain Exhibit 1020 Page 3
`
`

`

`APPROVED FOR LICENSE F
`
`INITIALS
`
`('^
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`1
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`(.4
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`CO
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`T N SMailed
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`Received
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`1d1 /5 iJiZ8
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`Entered
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`Counted
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`11. Application1
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`papers.
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`4."
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`II
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`5 '
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`N 0=1 5 1 9 3 ? 6 .
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`131 PTO 8RAT MA x 01992
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`Saint-Gobain Exhibit 1020 Page 4
`
`

`

`STAPLE
`
`4&REA
`
`-U.S.
`
`(OVERN14ENT PARt4TINO
`
`PATENT NUMBER.
`
`APPLICATION SERIAL NUMBER
`
`(o {SBCLASS 7
`I / ORIGINAL CLASSIFICATION
`CLASS
`1
`-;
`REFERENCE(S)
`
`1CROSS
`
`if-
`
`. 1 1~1 4
`
`0,7/___________________
`-11APPLICANT'S NAME (PLEASE
`PRINT)
`
`/ CLASS
`rcJg
`
`IONE SUBCLASS PER BLOCK)
`
`3c)
`
`4o D
`
`/glo Acrzsa
`
`IF REISSUE, ORIGINAL PATENT NUMBER
`
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`
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`FULL
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`
`EXAMINER (PLEASE TAMP OR PNT FU
`at
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`
`SPRIMARY
`ISSU cWsi4.o jp
`
`i
`
`uOEPARzM!NT OFCOMMERF-
`
`------------------------------------------------
`
`.1I
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`Saint-Gobain Exhibit 1020 Page 5
`
`

`

`Staple Issue Slip Here
`
`INDEX OF CLAIMS
`
`Claim
`
`Date
`
`Claim
`
`-Date~
`
`a *
`
`Z
`0
`
`l
`
`0I
`
`52
`53'_
`54
`55
`56
`
`59
`60
`- 61
`62
`63
`64
`6
`66
`67
`68
`69
`
`-70
`
`_
`
`_
`
`__
`
`_
`
`_
`
`-
`
`-
`
`_
`
`_
`
`_
`
`-
`
`-
`
`72-----------
`
`_
`
`_
`
`_
`
`-
`
`-
`
`T -
`
`-
`
`-
`
`-
`
`-
`
`-
`
`--
`
`~
`~
`
`-
`
`-
`
`-
`
`-
`
`--
`
`-
`
`-
`
`-
`
`SYMBOLS
`
`-
`
`+
`
`Allowed
`e .........
`*(Trrugt numeral) Canceled
`Raalcted
`.........
`N ............. Nn-eleehd
`.............. I o,rrence
`A.............Appeal
`o ...........Obheclad
`
`_
`
`-
`
`-
`
`-
`
`-
`
`-
`
`-
`
`_
`
`_
`
`_
`
`_
`
`_
`
`_
`
`__
`
`-
`
`-
`
`74
`75
`76
`77
`78.
`79
`80
`81
`
`__82
`
`83
`
`87
`88
`89
`90
`9'
`92-
`93
`94
`95
`96
`97
`98-
`99
`00
`
`567
`
`__ 1
`
`2 2
`
`IL.
`
`-
`
`7
`
`38
`
`a 34
`
`3_ 6
`__ 7
`
`I
`
`60 2-
`
`-
`
`-
`
`Saint-Gobain Exhibit 1020 Page 6
`
`

`

`SEARCHED
`Sub. EDate
`
`Class
`
`Exmr.
`
`r'
`
`3i1 34')j
`Oo3 a 1
`
`9'y s )47o
`
`30 6) Rig
`
`57o -.572
`470, 517
`
`PA
`
`A(5
`
`332
`
`I /7/o
`
`$~6\rJ\
`
`) 1/1 q(
`
`Cc
`
`CL
`
`SEARCH NOTES
`C A5wDate
`
`Exmr.
`
`I (
`
`iby1000 cc
`
`$9've Cus,
`C(
`
`l
`
`INTERFERENCE SEARCHED
`Class
`Sub.
`Date
`Exmr.
`
`/
`
`rz4,-
`2ibVJ
`
`It i?~q~ 66
`
`L
`
`cI ot
`
`461 L
`
`sna4 -4Af-
`
`o ve4.
`
`JJIfAX04"0 &
`
`So~m1 ,
`
`Saint-Gobain Exhibit 1020 Page 7
`
`

`

`United States Patent [1is9]
`Mursa
`
`11111Illl llll
`lllllll
`1 ll 1111llllllllllll1lll
`1lllll
`1lllllll
`US005094543A
`5,094,543
`[111 Patent Number:
`Patent: Mar. 10, 1992
`[45] Date of
`
`[54] PAINT MIXING CONTAINER
`Inventor: Laszlo Marsa, 4279 Lakeshore Road,
`[76]
`Kelowna, British Columbia, Canada,
`VIW 1W2
`
`[21] Appl. No.: 519,892
`May 7, 1990
`[22] Filed:
`
`..... 220/85 SP
`........
`2,606,694 8/1952 Galletta
`........ 220/63
`3,027,044 3/1962 Winstead........
`3,041,052 6/1962 Dedoes ...................... 366/247
`366/64 X
`3,134,577 5/1964 Bollmeier .........
`3,272,395 9/1966 Lawyer ...................... 222/570 X
`220/298
`3,371,817 3/1968 Gasbarra et al
`........ -
`3,820,692 6/1974 Swett etal. . . . . . . . . . . ........
`366/347
`3,858,767 1/1975 Bonn .............................. 222/572 X
`................. 222/570 X
`3,894,650 7/1975 Cruamp
`222/570 X
`3,913,785 10/1975 Pattershall ............
`220/298 X
`1/1976 Peppler .......................
`3,931,891
`4,0]0,934 3/1977 McCord et al.
`4,050,678 9/1977 Smth ......................... 366/130
`4,122,973 10/1978 Ahern ........................... 220/410X
`........... 366/98
`4,155,656 5/1979 Kramer ...........
`4,240,568 12/1980 Pool ........................ 222/570 X
`4,383,635 5/1983 Yotoriyama ....................... 299/1.5
`4,407,584 10/1983 Boudin et al .................. 366/279
`4,422,770 12/1983 Geible ................. 366/248
`220/298 X
`4,449,984 5/1984 Cruz ...............................
`4,460,279 7/1984 Krasney................ .366/247
`4,472,063 9/1984 Eickelmann ..................... 366/129
`4,538,922 9/1985 Johnson ......................... 366/279 X
`4,875,781 10/1989 Raska ...................... 366/228 X
`4,949,884 8/1990 Dahl .............................. 222/570
`Primary Examiner-Harvey C. Hornsby
`Assistant Examiner-C. Cooley
`Attorney, Agent, or Firm-Renner, Kenner, Greive,
`Bobak, Taylor & Weber
`References Cited
`ABSTRACT
`[57]
`U.S. PATENT DOCUMENTS
`A paint mixing container comprising a main body (2) of
`Mulford ......................... 366/252
`411,870 10/1889
`Pearl .
`circular cross section with a base (4), side walls and an
`413,546 8/1889
`Libbman ................... 366/331
`793,844 7/1905
`open top (6). There is a stirring arm (40) comprising a
`Reams .................. 248/213.2 X
`819,799 5/1906
`rotatable central shaft.(42) with a helical blade (43,100)
`Fay .
`871,988 11/1907
`rigidly mounted about the central shaft. As well, there
`Griffiths
`912,842 2/1909
`is a removable cover (20) with locking means (12, 52,
`Letherbury ................... 222/572 X
`975,542 11/1910
`70, 72, 73) to allow the cover to be attached to the main
`Walden .
`1,344,836 6/1920
`Harris ....................... 366/605 X
`body. The removable cover has a sealable opening (22,
`1,698,402 1/1929
`Henschel .................... 366/605 X
`69) and means (24) to rotatably support the stirring arm
`1,775,345 9/1930
`222/572 X
`Drood ........................
`2,022,342 11/1935
`in the interior of the main body.
`Danmnert ................. 222/572 X
`2,038,545 4/1936
`McCauley ................... 366/185 X
`2,585,334 2/1952
`220/447
`McNealy et al . ...........
`2,591,578 4/1952
`
`[63]
`
`Related U.S. Application Data
`Continumtation-in-part of Ser. No. 216,776, Jul. 8, 1988,
`Pat. No. 4,926,390.
`[30]
`Foreign Application Priority Data
`Jul. 8, 1987 [CA] Canada ................................. 541633
`......................... BOIF 7/24; B65D 47/14
`Int, CI
`[51]
`366/247; 220/298;
`[521 U.S, Cl ..................................
`220/306, 220/403; 220/410; 222/572; 366/249;
`366/281; 366/282; 366/312; 366/320; 366/347;
`366/605
`[58] Field of Search ............................. 366/279-285,
`366/241, 242, 244-254, 130, 310, 311, 347, 312,
`605, 214; 220/402, 403, 404, 408, 410, 447, 85
`SP, 470, 306, 298, 222/570-572, 470, 517,
`215/332
`
`[56]
`
`16 Claims, 3 Drawing Sheets
`
`Saint-Gobain Exhibit 1020 Page 8
`
`

`

`U.S. Patent
`
`Mar. 10, 1992
`
`Sheet 1 of 3
`
`5,094,543
`
`5.2
`
`53.
`
`4
`
`54.
`28 zo
`
`27
`
`52
`
`Saint-Gobain Exhibit 1020 Page 9
`
`

`

`U.S. Patent
`
`Mar. 10, 1992
`
`Sheet 2 of 3
`
`5,094,543
`
`2(
`6-I
`
`70
`
`60
`
`64
`
`Lo-7-r7
`
`Saint-Gobain Exhibit 1020 Page 10
`
`

`

`U.S. Patent
`
`Mar. 10, 1992
`
`Sheet 3 of 3
`
`5,094,543
`
`100,
`
`51- 9_
`
`Saint-Gobain Exhibit 1020 Page 11
`
`

`

`1
`
`PAINT MIXING CONTAINER
`
`CROSS REFERENCE TO RELATED
`APPLICATIONS
`The present application is a continuation-in-part of
`allowed U.S. Ser. No 216,776, filed July 8, 1988, now
`U.S. Pat. No. 4,926,390.
`TECHNICAL FIELD
`This invention relates generally to a paint mixing
`container and more specifically to a container for mix-
`ing automotive paints prior to application.
`BACKGROUND ART
`Presently, when paint is required, automotive body
`repair shops use paint mixing systems that require mix-
`ing base coat paints in one gallon containers designed
`for use on a power driven mixing machine The base
`paints are in turn mixed in a separate container to create
`the final desired colour. Thinners and hardeners are
`added and mixed by hand since it is important that these
`additives and the paint be thoroughly mixed in order to
`obtain a good final finish. Each of the mixing containers
`used must now be thoroughly cleaned using strong
`industrial chemicals.
`DISCLOSURE OF THE INVENTION
`The present invention is a paint mixing container
`comprising:
`amain body of circular cross-section with a base, side
`walls and an open top;
`a stirring arm comprising a rotatable central shaft
`with a helical blade rigidly mounted about said central
`shaft;
`a removable cover for covering the open top of said
`main body with a sealable opening and means to rotat-
`ably support said stirring arm in the interior of the main
`body; and
`locking means to allow said removable cover to be
`removable attached to the open top of said main body.
`In a preferred embodiment of the present invention
`the main body has a capacity of 6.7 liters allowing all
`the ingredients necessary for preparing a coat of paint
`to be mixed in a single container. As well, in the pre-
`ferred embodiment of the present invention, the main
`body is fitted with a disposable plastic liner which can
`be discarded after the paint has been mixed thereby
`saving clean-up time and avoiding the use of potentially
`harmful cleaning chemicals. The stirring arm of the
`present invention avoids the present practice of manu-
`ally stirring the paint and additive mixture and uses a
`helical blade rotated by a powdered mixer to thor-
`oughly and consistently stir and blend the paint. The
`sealable opening in the cover of the present invention
`allows easy pouring of the main body contents or the
`addition of ingredients to the main body. As well, the
`sealable opening provides a point of attachment for a
`spray gun assembly so the final paint preparation can be
`applied directly from the mixing container thereby min
`imizing paint spillage.
`BRIEF DESCRIPTION OF THE DRAWINGS
`The present invention is illustrated, merely by way o
`example, in the drawings in which:
`f
`FIG. I is a plan view of a preferred embodiment ol
`the present invention;
`
`5,094,543
`FIG 1A is an enlarged fragmentary plan view show-
`ing a modified spout and flap:
`FIG. 2 is a section view of a preferred embodiment of
`the present invention showing the stirring blade, depict-
`5 ming schematically a power mixer for use therewith;
`FIG. 3 is a view of the wedge locking tabs of the marn
`body;
`FIG. 4 is a view of the wedge locking tabs on the
`cover;
`o10 FIG. 5 is a plan view of the removable cover of a
`second embodiment of the present invention;
`FIG. 6 is a section view through the second embodi-
`ment;
`FIG. 6A is an enlarged fragmentary view showing a
`15 spout filter,
`FIG. 7 isa detailed view of the locking arrangement
`between the removable cover and the main body of the
`second embodiment;
`FIG. 8 is a section view through the helical blade
`20 used with the second embodiment of the present inven-
`tion; and
`FIG. BA is an enlarged fragmentary elevational view
`depicting a radial tab on the shaft, and
`FIG. 9 shows the inner liner for insertion into the
`25 main body.
`PREFERRED EMBODIMENT FOR CARRYING
`OUT THE INVENTION
`A preferred embodiment of the present invention is
`30 best shown in FIG. 2 and comprises main body 2, re-
`movable cover 20 and stirring arm 40.
`Main body 2 is a cylindrical container with a sealed
`base 4 and an open top 6. Base 4 is shaped as a flattened
`cone so that the base slopes downwardly from the cen-
`35 tre at a two degree angle to the outer edges of the main
`body. Also toward the base of the main body 2 is cir-
`cumferential notch 8 to allow the main body to be easily
`secured to a powered mixer platform. At open top 6, the
`wall of main body 2 is shaped to form lip 10. Wire
`40 handle 14 is mounted to main body 2 by mounting tabs
`15 that extend downwardly from hp 10. At spaced inter-
`vals around the lower edge lip 10 are wedge shaped tabs
`12 projecting outwardly from the lip at shown in FIG.
`3. These tabs 12 are part of the locking system which
`45 allows removable cover 20 to be sealed atop mainm body
`2.
`
`Removable cover 20 is best shown in FIG. 1 with
`sealable spout 22 at one edge of the cover and stirring
`arm support housing 24 mounted on the underside at the
`50 centre of the cover. The circumference of cover 20 is
`bounded by raised lip 27 with internal channel 28 hav-
`ing a semi-circular cross section shaped to fit over lip 10
`of the main body. As is best shown in FIG. 4, raised lip
`27 is shaped into a right angled lip 50 just below internal
`55 channel 28. Right angled lip 50 has a series of wedge
`tabs 52 spaced about the lower internal edge of the lihp
`creating tapered channels 53 above each tab. Wedge
`tabs 52 are tapered in the opposite direction to wedge
`S tabs 12 to main body 2. Handles 26 are used to rotate
`60 removable cover 20 after the cover has been placed
`atop main body 2. Rotating cover 20 causes wedge tabs
`12 of man body 2 to engage wedge tabs 52 of the cover
`causing tabs 12 to become wedged in channels 53 of the
`cover thereby sealing the cover into place on the main
`f 65 body.
`Sealable spout 22 is formed by walls extending up-
`wardly around aperture 29 in cover 20. Angled fap 30 is
`pivotally connected to the top of cover 20 and serves to
`
`Saint-Gobain Exhibit 1020 Page 12
`
`

`

`5,094,543
`
`3
`seal spout 22 as angled flap 30 is formed with an outer
`hlip 32 which fits tightly about the walls of spout 22.
`Biasing spring 33 ensures that angled flap 30 is normally
`in the closed positioned as shown min FIG. 2. To open
`spout 22, pressure is apphlied to surface 35 of angled flap
`30 to pivot the flap into the raised position shown by
`dashed lines in FIG. 2. It is understood that spout 22
`may be formed into any adequate shape with a rectan-
`gular and circular cross section being described min the
`preferred embodiment FIG. 1A shows a modified
`spout and flap with like numbers being primed.
`Stirring arm in support housing 24 is molded to the
`underside of cover 20 to rotatably support shaft 42 of
`stirring arm 40. Shaft 42 extends from the interior of
`main body 2 through cover 20. The upper end of shaft
`42 is keyed as shown mn FIG. 2 to allow the shaft to be
`connected to a powered mixer 47. Helical blade 43 is
`mounted about shaft 42 and spans the diameter of the
`main body with adequate clearance of the side walls to
`allow the blade to freely rotate. Helical blade 43 is made
`from flexible plastic and is attached to shaft 42 by lower
`mounting bracket 44 fitted over the lower end of shaft
`42 and by upper bracket 45. Lower mounting bracket44
`also supports wire stirrers 46 that extend essentially
`radially to shaft 42 at a slight downward angle of two
`degrees to match the slope of base 4. These stirrers are
`necessary to keep the lowest layer of fluid in the main
`body circulating so that it does not stagnate.
`Before using the present minvention, one can insert a
`formed plastic liner (not shown) corresponding to the
`internal shape of the main body 2. This liner extends
`above the upper edge of the main body and is folded
`over hlip 10 before cover 20 is rotated min place to seal the
`mamin body. The plastic hliner prevents the inner surface
`of the main body from coming into contact with the
`contents inside the plastic hliner. Thus, the clean-up pro-
`cedure necessary with the present invention is greatly
`simplified since all that is necessary for the plastic liner
`to be removed from the main body and discarded.
`A second embodiment of the present invention is
`illustrated in FIGS 5 and 6. In this second embodiment,
`parts analogous to the parts of the first embodiment are
`identically numbered. The use of a formed plastic liner
`is also presented.
`The second embodiment comprises a paint mixing
`container having a slightly tapered mamin body 2, a re-
`movable cover 20 and stirring arm 40. Preferably, the
`main body has approximately a 5.5 hliter capacity and a
`scale 64 is marked on the main body. Main body 2 has a
`plurality of tapered indentations 60 that extend down-
`wardly from open top 6. Base 4 of the main body is
`recessed and formed with engagement tabs 62. Tapered
`indentations 60, recessed base 4 and engagement tabs 62
`allow the main body to be secured in a conventional
`manner to standard power driven paint mixing ma-
`chmines.
`A pouring spout 65 is formed min the main body of the
`container adjacent the open top 6. As best shown in
`FIGS. 5 and 6, removable cover 20 is formed with an
`opening 67 that aligns with spout 65 to allow pouring of
`fluids from the container. An independent sealing cap
`69 is provided for fitting over opening 67 in order to
`seal pouring spout 65. Opening 67 is formed with a
`raised lip 74 which is engaged by sealing cap 69. If
`necessary, cover 20 can be provided with a filter mem-
`ber comprising a fine mesh screen 71 to filter fluids as
`they are poured from the container as shown in FIG.
`6A.
`
`20
`
`5
`
`Cover 20 is also formed with cutouts 68 spaced to
`align with tapered indentations 60 min the main body of
`the container. A central stirring arm support housing 24
`is also formed in cover 20.
`FIG. 7 shows a detailed view of the manner in which
`removable cover 20 is attached and locked to main
`body 2. Locking means are provided comprising a
`channel 70 formed about the periphery of removable
`cover 20 on the underside of the cover. Channel 70 is
`10 formed with an inwardly directed flange 72. A corre-
`spondingly formed lip 73 is provided about open top 6
`of main body 2 designed to interfit with channel 70.
`When cover 20 is press fitted atop main body 2, flange
`72 of cover 20 is sufficiently resilient to move out-
`15 wardly about lip 73 and then inwardly to engage be-
`neath the lip as shown to hold cover 20 firmly atop main
`body 2. Cover 20 is removed by reaching under lip 73
`and applying an outward force on flange 72 to release
`the flange from under lip 73.
`The embodiment of the present invention also in-
`cludes a removable liner as shown in FIG 9 Liner 79
`comprises a thin walled self-supporting flexible shell
`having a base 80, side walls 82 and an open top 84
`25 adapted to fit within main body 2. Tapered indentations
`25 85 are formed in the side walls 82 to align with similar
`indentations 60 in the main body 2 This liner is placed
`inside the main body to protect the body from fluids
`held within the container. The liner is easily removable
`3 and provides for easy cleaning if desired Alternatively,
`if the liner cannot be cleaned, it can discarded and re-
`placed with a new hliner.
`Positioning means are provided to align and lock the
`liner shell into main body 2 comprising indentations 90
`35 and projections 92 formed on the side walls and base of
`liner 79 and adapted to interfit with corresponding pro-
`jections and indentations formed in main body 2 Liner
`79 is also provided with a lip 94 about a open top 84 and
`a spout 95 that overlies lip 73 and spout 65 of main body
`40 2 when the liner is inserted into the main body 2. In
`FIG 7, liner 79 is shown by dashed lines and is clamped
`between cover 20 and main body 2 to assist in positively
`locating the liner within the main body.
`Referring to FIG. 6, the paint mixing container of the
`45 second embodiment is provided with a removable man-
`ually rotatable handle 97 to operate stirring arm 40 As
`with the previous embodiments, stirling arm 40 com-
`prises a helical blade 100 mounted to a shaft 101 rotat-
`able min stirring arm support housing 24 An adapter 104
`50 is mounted to the top of shaft 101 to accept rotatable
`handle 97. Adaptor 104 is formed with a pair of projec-
`tions 106 that engage in holes 108 formed in handle 97
`Helical blades 100 and shaft 101 are very similar to
`the arrangement of the first embodiment. Helical blade
`55 100 is mounted about shaft 101 and spans the diameter
`of the main body with adequate clearance of the side
`walls and the liner to allow the blade to rotate freely. As
`best shown min FIG. 8, helical blade 100 is molded from
`flexible plastic and is attached to shaft 101 by mounting
`60 means comprising a lower bracket 106 that is fitted over
`the lower end of shaft 101. Helical blade 100 terminates
`at its upper end in radial tab 105 that is formed with an
`aperture 105A to engage in a notch 107 about shaft 101.
`Lower bracket 106 and the lower portion of helical
`65 blade 100 include an integrally formed extension 110
`adapted to extend radially to the axis of shaft 101 adja-
`cent base 4 of main body 2 In order to ensure proper
`mixing of fluids at the bottom of the container. The
`
`Saint-Gobain Exhibit 1020 Page 13
`
`

`

`5,094,543
`
`10
`
`15
`
`underside of extension 110 is formed with ridges 112 to
`ensure complete mixing of the fluid.
`Although the present invention has been described in
`some detail by way of example for purposes of clarity
`it will be apparent that certain 5
`and understandming,
`changes and modifications may be practiced within the
`scope of the appended claims.
`I claim:
`1. A paint mixing container comprising:
`a main body of circular cross-section with a base, side
`walls and an open top, wherein said base is a cone
`having an apex at the center of the base and sides
`sloping downwardly to join with the side walls of
`the main body,
`a stirring arm comprising a rotatable central shaft
`having a longitudinal axis with a helical blade rig-
`idly mounted to the base thereof by a lower mount-
`ing member mounted about said central shaft, said
`helical blade extending upwardly and outwardly 20
`from said lower mounting member to smoothly
`connect said helical blade to said lower mounting
`member, said helical blade extending upwardly
`about said central shaft for one complete revolu-
`tion of the shaft, the upper end of said helical blade
`being attached to said central shaft by an upper
`mounting member extending toward and encir-
`cling said central shaft, said upper mounting mem-
`ber compnses a radial tab engageable with a notch 30
`provided in said central shaft, said notch engaging
`said radial tab through an aperture carried by said
`radial tab;
`a removable cover for covering the open top of said
`main body having a sealable opening and means to 35
`rotatably support said stirrming arm in the interior of
`the main body, said main body further including a
`pouring spout formed ahlignable with said sealable
`opening in said removable cover;
`locking means to allow said removable cover to be 40
`removably attached to the open top of said main
`body;
`wherein said locking means comprises a channel
`formed about the periphery of said removable
`cover having an inwardly directed flange, and a 45
`correspondingly formed lip about said open top of
`said main body to interfit with said channel, said
`flange of said removable cover being adapted to
`engage and hold said lip in order to releasably hold 50
`said removable cover atop said main body when
`said cover is press fitted over said main body; and
`an independent sealing cap for fitting over said seal-
`able opening in order to seal pouring spout.
`2. A paint mixing container as claim an claim 1 in 55
`which the sloping sides of the base cone forms an angle
`of two degrees to the horizontal.
`
`3 A paint mixing container as claimed in claim 1 min
`which the main body is made from plastic
`4. A paint mixing container as claimed in claim 1 in
`which said main body is fitted with disposable and flexi-
`ble liner.
`5, A paint mixing container as claimed in claim 4 in
`which said liner comprises a self-supporting flexible
`shell having a base, side walls and an open top adapted
`to fit within said main body with positioning means to
`align and lock said shell into said main body.
`6. A paint mixing container as claimed in claim 5 min
`which said positioning means comprises indentations
`and projections formed in said shell adapted to interfit
`with corresponding projections and indentations
`formed in said mam body
`7. A paint mixing container as claimed in claim 5 in
`which said shell is formed with a lip about said open top
`to overlie said lip of said main body.
`8. A paint mixing container as claimed min claim 1 in
`which said lower mounting member for said helical
`blade is a tubular boss which fits about the base of said
`central shaft.
`9. A paint mixing container as claimed in claim 1 in
`which said helical blade is made from flexible plastic.
`10. A paint mixing container as claimed in claim 1 in
`which said means to support said stirring arm is a tubu-
`lar shaft support mounted to said cover and adapted to
`rotatably hold the upper portion of the central shaft of
`said stirring arm so that the central shaft extends
`through the cover and into the interior of the main body
`where the helical blade is attached for stirring the con-
`tents held in the main body.
`11. A paint mixing container as claimed in claim 1 in
`which said central rotatable shaft has a keyway at its
`upper end to allow powered rotary driving means to be
`attached thereto.
`12. A paint mixing container as claimed in claim 1
`including indentations formed in said side walls and a
`recessed base to allow said main body to be held by
`conventional paint mixing machines.
`13. A paint mixing container as claimed in claim 1
`including a removable, manually rotatable handle to
`operate said stirring arm
`14. A paint mixing container as claimed in claim I in
`which said mounting means and said helical blade in-
`clude an integrally formed extension member adapted
`to extend radially to the longitudinal axis of said central
`shaft adjacent the base of said main body to ensure
`proper mixing of material adjacent the base of said main
`body.
`15, A paint mixing container as claimed in claim 14
`further including ridge means carried by the underside
`of said extension member.
`16. A paint mixing container as claimed mn claim 1
`including a filter member carmed by said paint mixing
`container, extending over said sealable opening.
`.
`.
`*
`*
`*
`
`Saint-Gobain Exhibit 1020 Page 14
`
`

`

`UNITED STATES PATENT AND TRADEMARK OFFICE
`CERTIFICATE OF CORRECTION
`PATENT NO.
`5,094,543
`:
`DATED
`: March 10, 1992
`INVENTOR(S) : Laszlo Murzsa
`It is certified that error appears in the above-identified patent and that said Letters Patent is hereby
`worrettd as show bdmw: On the title
`page:
`Item [76] "Inventor: Mursa" should read "Inventor: Murzsa"
`
`Col. 1, line 54 "powdered" should read "powered"
`
`Col. 2, line 42 "edge lip" should read "edge of lip"
`
`Col. 2, line 67 "fap" should read "flap"
`
`Col. 3, line 38 "necessary for" should read necessary is for"
`
`Col. 4, line 31 "can discarded" should read "can be discarded"
`
`Col. 5, claim 1, line 54 "seal pouring" should read "seal said pouring"
`
`Col. 5, claim 2, line 55 "as claim" should read "as claimed"
`
`Col. 6, claim 4, line 4 "with disposable" should read "with a disposable"
`
`Signed and Sealed this
`
`Twenty-first Day of September, 1993
`
`Attest:
`
`Attesting Officer
`
`Commisioner of Parents and Trademarks
`
`BRUCE LEHMAN
`
`Saint-Gobain Exhibit 1020 Page 15
`
`

`

`_3 /
`
`PATENT APPLICATION SERIAL NO.
`
`U.S. DEPARTMENT OF COMMERCE
`PATENT AND TRADEMARK OFFICE
`FEE RECORD SHEET
`
`140 05/11/90 07519892
`
`1 201
`
`221.00 CK
`
`PTO-1556
`(5/87)
`
`Saint-Gobain Exhibit 1020 Page 16
`
`

`

`BEST COPY
`
`OR N PTO-1082
`
`EPRSS MAIL IAM R•B32300223X. Case Docket No. MiR.P.US0002
`
`5
`
`1990
`
`THE OMMISSIONER OF PATENTS AND TRADEMARKS
`ington, D.C. 20231
`
`O
`
`Sir:
`
`Transmitted herewith for filing is the petont application of
`
`Inventor(s): Laszlo0 Murzsa
`
`For: PAINT MIXING CONTAER
`
`Enclosed are:
`sheets of drawing(s) One xerographic set)
`Three (3)
`X
`An assignment of the invention to
`
`A certified copy of a
`An associate power of attorney
`A verified statement to establish small entity status under 37 CF
`37 CFR 1.27
`
`application
`
`R 1.9 and
`
`The filing fee has been calculated as shown below:
`
`FOR:
`BASIC FEE
`
`NO. FILED
`/
`/5/
`
`NO. EXTRA
`/
`
`TOTAL CLAIMS
`
`26 -20
`
`INDEP CLAIMS
`
`1 -3
`
`6
`
`0
`
`SMULTIPLE DEPENDENT CLAIM PRESENTED
`
`SMALL ENTITY
`
`RATE
`
`FEE
`s185.00
`
`x 6 $ 36.00
`
`0.00
`x18 S
`+60 $ 0.00
`
`OTHER THAN A
`SMALL ENTITY
`
`OR RATE
`
`FEE
`s370.00
`x 12 s
`x 36
`s
`
`+120 s
`
`TOTAL
`
`221.00
`
`TOTAL
`
`Pledse charge my Deposit Account No. 18-0987 the amount of $
`duplicate copy of this sheet is enclosed.
`
`.
`
`A
`
`to cover the filing fee is enclosed.
`A check In the amount of S 221.00
`The Commissioner Is hereby authorized to charge payment of the following fees
`associated with this communication or credit any overpayment to Deposit
`Account No. 18-0987. A duplicate copy of this sheet Is enclosed.
`
`X x
`
`X Any additional filing fees required under 37 CFR 1.16
`Any patent application processing fees under 37 CFR 1.17
`
`The Commissioner is hereby authorized to charge payment of the following fees
`during the pendency of this application or credit any overpayment to Deposit
`Account No. 18-0987. A duplicate copy of this sheet Is enclosed.
`Any patent application processing fees under 37 CFR 1.I17
`The Issue fee set in 37 CFR 1.18 at or before mailing of the Notice of
`Allowance, pursuant to 37 CFR 1.311(b)
`Any filing fees under 37 CFR 1,16 for presentation of extra claims
`
`Respectfully submitted,
`
`c/ !1 n 1.
`Donald J. Bobak, Reg. No. 27,182
`Renner, Kenner, Greive, Bobak, Taylor & Weber
`1610 First National Tower
`Akron, Ohio 44308-1456
`(216) 376-1242
`
`Saint-Gobain Exhibit 1020 Page 17
`
`

`

`IN THE UNITED STATES PATENT AND TRADEMARK OFFICE
`
`01/5 989
`
`))
`
`))
`
`))
`
`)
`
`)
`)
`
`In the application of
`
`LASZLO MURZSA
`
`Serial No.
`
`Filed
`
`For PAINT MIXING
`CONTAINER
`
`CERTIFICATE OF MAILING VIA EXPRESS MAIL
`I hereby certify that the following correspondence was deposited with the
`United States Postal Service as Express Mail - La