Granted Patent
Utility
US 4,978,765 · App. 07/337,803
Process for the production of acrylonitrile
Inventors:
Yutaka; Sasaki, Kunio Mori, Kiyoshi Moriya
Patented Case
View Patent ↗
Granted: Dec 18, 1990
Filed: Apr 14, 1989
Inventors
Yutaka; Sasaki
Kunio Mori
Kiyoshi Moriya
Assignee (at issue)
Nitto Chemical Industry Co., Ltd.
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.