Granted Patent
Utility
US 5,169,905 · App. 07/627,770
Hydrogenation catalyst composition and process for hydrogenating olefinically unsaturated polymer using the same
Inventors:
Yoshiharu Hashiguchi, Hideo Katsumata, Kunio Goshima, Toshio Teramoto, Yasuhiko Takemura
Patented Case
View Patent ↗
Granted: Dec 8, 1992
Filed: Dec 14, 1990
Inventors
Yoshiharu Hashiguchi
Hideo Katsumata
Kunio Goshima
Toshio Teramoto
Yasuhiko Takemura
Assignee (at issue)
Japan Synthetic Rubber Corporation
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.