Granted Patent
Utility
US 5,654,248 · App. 08/433,545
Catalyst for polymerizing alpha-olefins and process for polymerization
Inventors:
Mamoru Kioka, Akinori Toyota, Norio Kashiwa, Toshiyuki Tsutsui
Patented Case
View Patent ↗
Granted: Aug 5, 1997
Filed: May 2, 1995
Inventors
Mamoru Kioka
Akinori Toyota
Norio Kashiwa
Toshiyuki Tsutsui
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.