Granted Patent
Utility
US 4,254,241 · App. 06/102,833
Process for producing polyoxyalkylene glycol modified polyesters
Inventors:
Kurt Weinberg, Gordon C. Johnson
Patented Case
View Patent ↗
Granted: Mar 3, 1981
Filed: Dec 12, 1979
Inventors
Kurt Weinberg
Gordon C. Johnson
Assignee (at issue)
Union Carbide Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.