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METHOD AND APPARATUS FOR DRILLING WITH CASING

12/237,215 | U.S. Patent Application

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Location ELECTRONIC
Filed Sept. 24, 2008
Examiner ZAKIYA W BATES
Class 166
Art Group 3676
Patent No. 8,281,877
Case Type Utility - 166/077530
Status Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362
Parent 11/563,534 Abandoned
Parent 10/794,797 Patented
Parent 60/452,318 Expired
Parent 60/451,965 Expired
Parent 10/382,353 Patented
Parent 09/486,901 Patented
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Last Updated: 1 year, 3 months ago
Date # Transaction