Granted Patent
Utility
US 5,374,700 · App. 07/686,599
Ethylene copolymer
Inventors:
Toshiyuki Tsutsui, Ken Yoshitsugu, Takashi Ueda
Patented Case
View Patent ↗
Granted: Dec 20, 1994
Filed: Apr 17, 1991
Inventors
Toshiyuki Tsutsui
Ken Yoshitsugu
Takashi Ueda
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.