Granted Patent
Utility
US 5,142,007 · App. 07/735,116
Process for the production of cycloolefin-based random copolymer
Inventors:
Toshihiro Sagane, Toshiaki Kuroiwa, Shuji Minami
Patented Case
View Patent ↗
Granted: Aug 25, 1992
Filed: Jul 24, 1991
Inventors
Toshihiro Sagane
Toshiaki Kuroiwa
Shuji Minami
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.