Granted Patent
Utility
US 4,065,612 · App. 05/671,975
Phenol modified polymerization catalyst and polymerization process
Inventors:
Anthony D. Hamer, Frederick J. Karol
Patented Case
View Patent ↗
Granted: Dec 27, 1977
Filed: Mar 30, 1976
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.