Granted Patent
Utility
US 5,869,653 · App. 08/960,909
Hydrogenation of nitriles to produce amines
Inventor:
Thomas A. Johnson
Patented Case
View Patent ↗
Granted: Feb 9, 1999
Filed: Oct 30, 1997
Inventor
Thomas A. Johnson
Assignee (at issue)
Air Products and Chemicals, Inc.
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.