Granted Patent
Utility
US 5,122,491 · App. 07/290,110
Catalyst for polymerizing an olefin and process for polymerizing an olefin
Inventors:
Mamoru Kioka, Norio Kashiwa, Toshiyuki Tsutsui, Akinori Toyota
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: Dec 16, 1988
Inventors
Mamoru Kioka
Norio Kashiwa
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.