Granted Patent
Utility
US 5,539,069 · App. 08/287,799
Olefin polymerization catalysts and methods of olefin polymerization
Inventors:
Toshiyuki Tsutsui, Ken Yoshitsugu
Patented Case
View Patent ↗
Granted: Jul 23, 1996
Filed: Aug 9, 1994
Inventors
Toshiyuki Tsutsui
Ken Yoshitsugu
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.