Granted Patent
Utility
US 5,081,089 · App. 07/570,935
Chromium catalyst compositions and polymerization utilizing same
Inventors:
Louis J. Rekers, Stanley J. Katzen
Patented Case
View Patent ↗
Granted: Jan 14, 1992
Filed: Aug 22, 1990
Inventors
Louis J. Rekers
Stanley J. Katzen
Assignee (at issue)
National Distillers and Chemical 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.