Granted Patent
Utility
US 4,293,673 · App. 06/095,010
Spheroidal polymerization catalyst, process for preparing, and use for ethylene polymerization
Inventors:
Anthony D. Hamer, Frederick J. Karol
Patented Case
View Patent ↗
Granted: Oct 6, 1981
Filed: Nov 28, 1979
Inventors
Anthony D. Hamer
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.