Granted Patent
Utility
US 5,422,328 · App. 08/172,819
Process for preparing a catalyst useful for producing a nitrile
Inventors:
Takashi Ushikubo, Itaru Sawaki, Kazunori Oshima, Kei Inumaru, Satoshi Kobayakawa, Ken-ichi Kiyono
Patented Case
View Patent ↗
Granted: Jun 6, 1995
Filed: Dec 27, 1993
Inventors
Takashi Ushikubo
Itaru Sawaki
Kazunori Oshima
Kei Inumaru
Satoshi Kobayakawa
Ken-ichi Kiyono
Assignee (at issue)
Mitsubishi Kasei 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.