Granted Patent
Utility
US 5,321,107 · App. 08/143,244
Olefin polymerization catalyst and process for the polymerization of olefins
Inventors:
Toshiyuki Tsutsui, Kazunori Okawa, Akinori Toyota
Patented Case
View Patent ↗
Granted: Jun 14, 1994
Filed: Oct 29, 1993
Inventors
Toshiyuki Tsutsui
Kazunori Okawa
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.