Granted Patent
Utility
US 4,235,821 · App. 06/008,315
Hydrogenation of aliphatic nitriles to primary amines
Inventors:
Walter A. Butte, Jr., William J. Murtaugh, Richard E. Mitchell
Patented Case
View Patent ↗
Granted: Nov 25, 1980
Filed: Feb 1, 1979
Inventors
Walter A. Butte, Jr.
William J. Murtaugh
Richard E. Mitchell
Assignee (at issue)
SUNTEC 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.