Granted Patent
Utility
US 5,218,071 · App. 07/900,784
Ethylene random copolymers
Inventors:
Toshiyuki Tsutsui, Ken Yoshitsugu, Akinori Toyota
Patented Case
View Patent ↗
Granted: Jun 8, 1993
Filed: Jun 22, 1992
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.