Granted Patent
Utility
US 5,239,006 · App. 07/781,970
Cycloolefin random copolymer composition and uses thereof
Inventors:
Toshihiro Sagane, Masayuki Okabe
Patented Case
View Patent ↗
Granted: Aug 24, 1993
Filed: Oct 24, 1991
Inventors
Toshihiro Sagane
Masayuki Okabe
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.