Granted Patent
Utility
US 4,438,281 · App. 06/460,505
Selective production of monoalkanolamines from alkylene oxides and ammonia over acidic inorganic catalysts
Inventor:
Fred L. Johnson, Jr.
Patented Case
View Patent ↗
Granted: Mar 20, 1984
Filed: Jan 24, 1983
Inventor
Fred L. Johnson, Jr.
Assignee (at issue)
Texaco 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.