Granted Patent
Utility
US 5,015,766 · App. 07/284,727
Preparation process of acrylamide
Inventors:
Yoshihiko Kambara, Itsuo Oonaka, Koichi Asao, Kyoko Fukushima
Patented Case
View Patent ↗
Granted: May 14, 1991
Filed: Dec 15, 1988
Inventors
Yoshihiko Kambara
Itsuo Oonaka
Koichi Asao
Kyoko Fukushima
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.