Granted Patent
Utility
US 5,162,531 · App. 07/585,558
Mixed metal oxide catalytic process for the preparation of triethylenediamines
Inventor:
Stephen W. King
Patented Case
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Granted: Nov 10, 1992
Filed: Sep 20, 1990
Inventor
Stephen W. King
Assignee (at issue)
Union Carbide Chemicals & Plastics Technology LLC
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.