Granted Patent
Utility
US 4,267,309 · App. 06/117,294
Process for preparing olefin oxide polymerization catalysts
Inventors:
George L. Goeke, Frederick J. Karol
Patented Case
View Patent ↗
Granted: May 12, 1981
Filed: Jan 31, 1980
Inventors
George L. Goeke
Frederick J. Karol
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.