Granted Patent
Utility
US 5,714,426 · App. 08/459,795
Olefin polymerization catalyst
Inventors:
Toshiyuki Tsutsui, Ken Yoshitsugu, Akinori Toyota
Patented Case
View Patent ↗
Granted: Feb 3, 1998
Filed: Jun 2, 1995
Inventors
Toshiyuki Tsutsui
Ken Yoshitsugu
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.