Granted Patent
Utility
US 5,472,925 · App. 08/193,403
Catalyst for the production of nitriles
Inventors:
Takashi Ushikubo, Kazunori Oshima, Atsushi Kayo, Tiaki Umezawa, Ken-ichi Kiyono, Itaru Sawaki, Hiroya Nakamura
Patented Case
View Patent ↗
Granted: Dec 5, 1995
Filed: Feb 7, 1994
Inventors
Takashi Ushikubo
Kazunori Oshima
Atsushi Kayo
Tiaki Umezawa
Ken-ichi Kiyono
Itaru Sawaki
Hiroya Nakamura
Assignee (at issue)
MITSUBISHI CHEMICAL 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.