Granted Patent
Utility
US 5,126,301 · App. 07/492,341
Solid catalyst for polymerizing an olefin
Inventors:
Toshiyuki Tsutsui, Ken Yoshitsugu, Akinori Toyota, Norio Kashiwa
Patented Case
View Patent ↗
Granted: Jun 30, 1992
Filed: Mar 12, 1990
Inventors
Toshiyuki Tsutsui
Ken Yoshitsugu
Akinori Toyota
Norio Kashiwa
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.