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PREPARATION OF AMMONIUM RARE EARTH DOUBLE OXALATES AND RARE EARTH OXIDES PRODUCED THEREFROM

08/427,737 | U.S. Patent Application

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Location FILE REPOSITORY (FRANCONIA)
Filed April 24, 1995
Examiner STEVEN J BOS
Class 423
Art Group 1103
Patent No. 5,662,874
Case Type Utility - 423/263000
Status Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362
Parent 08/154,486 Abandoned
Parent 07/791,158 Abandoned
Child 90 14031
Last Updated: 4 years, 9 months ago
Date # Transaction