Granted Patent
Utility
US 5,639,842 · App. 08/650,425
Ethylene random copolymers
Inventors:
Toshiyuki Tsutsui, Ken Yoshitsugu, Akinori Toyota
Patented Case
View Patent ↗
Granted: Jun 17, 1997
Filed: May 20, 1996
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.