Granted Patent
Utility
US 4,820,674 · App. 07/149,092
Process for preparing a hydrosilylation catalyst
Inventors:
Kouji Shiozawa, Yoshiharu Okumura, Chihiro Imai, Nobukazu Okamoto
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Jan 27, 1988
Inventors
Kouji Shiozawa
Yoshiharu Okumura
Chihiro Imai
Nobukazu Okamoto
Assignee (at issue)
Toa Nenryo Kogyo Kabushiki Kaisha
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.