Granted Patent
Utility
US 4,921,988 · App. 07/280,727
Process for preparing aminopropyl silanes
Inventors:
Kazutoshi Takatsuna, Mamoru Tachikawa, Kouji Shinozawa, Masashi Nakajima, Akihito Shinohara, Yoshiharu Okumura
Patented Case
View Patent ↗
Granted: May 1, 1990
Filed: Dec 6, 1988
Inventors
Kazutoshi Takatsuna
Mamoru Tachikawa
Kouji Shinozawa
Masashi Nakajima
Akihito Shinohara
Yoshiharu Okumura
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.