Granted Patent
Utility
US 5,650,471 · App. 08/579,011
Process for the production of cycloolefin random copolymer
Inventors:
Yoshiharu Abe, Toshihiro Sagane
Patented Case
View Patent ↗
Granted: Jul 22, 1997
Filed: Dec 27, 1995
Inventors
Yoshiharu Abe
Toshihiro Sagane
Assignees (at issue)
Mitsui Petrochemical Industries, Ltd.
Hoechst GmbH
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.