Granted Patent
Utility
US 4,312,786 · App. 06/154,669
Process for polymerizing olefins and polymerization catalysts used therefor
Inventors:
Stanley J. Katzen, Louis J. Rekers
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: May 30, 1980
Inventors
Stanley J. Katzen
Louis J. Rekers
Assignee (at issue)
National Petro Chemicals 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.