Granted Patent
Utility
US 4,376,191 · App. 06/307,580
Use of dialkylzinc compounds to initiate polymerization of ethylene with chromium oxide catalysts
Inventor:
Reginald W. Geck
Patented Case
View Patent ↗
Granted: Mar 8, 1983
Filed: Oct 1, 1981
Inventor
Reginald W. Geck
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.