Granted Patent
Utility
US 5,091,352 · App. 07/407,436
Olefin polymerization catalyst component, olefin polymerization catalyst and process for the polymerization of olefins
Inventors:
Mamoru Kioka, Toshiyuki Tsutsui, Akinori Toyota
Patented Case
View Patent ↗
Granted: Feb 25, 1992
Filed: Sep 14, 1989
Inventors
Mamoru Kioka
Toshiyuki Tsutsui
Akinori Toyota
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.