Granted Patent
Utility
US 5,543,377 · App. 08/456,805
Olefin polymerization catalysts and methods of olefin polymerization
Inventors:
Toshiyuki Tsutsui, Ken Yoshitsugu
Patented Case
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Granted: Aug 6, 1996
Filed: Jun 1, 1995
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.