Granted Patent
Utility
US 4,980,421 · App. 07/343,580
Novel catalyst for hydrogenation of polymer and process for hydrogenating polymer with the catalyst
Inventors:
Toshio Teramoto, Kunio Goshima, Mikio Takeuchi
Patented Case
View Patent ↗
Granted: Dec 25, 1990
Filed: Apr 26, 1989
Inventors
Toshio Teramoto
Kunio Goshima
Mikio Takeuchi
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.