Granted Patent
Utility
US 4,918,133 · App. 07/363,884
Cycloolefin type random copolymer compositions
Inventors:
Satoru Moriya, Akio Ishimoto, Yoshinori Akana, Yozo Yamamoto, Kotaro Kishimura, Fumitoshi Ikejiri
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Jun 7, 1989
Inventors
Satoru Moriya
Akio Ishimoto
Yoshinori Akana
Yozo Yamamoto
Kotaro Kishimura
Fumitoshi Ikejiri
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.