Granted Patent
Utility
US 5,166,434 · App. 07/677,989
Process for the preparation of aromatic-substituted unsaturated amides
Inventor:
Kathleen S. Laurenzo
Patented Case
View Patent ↗
Granted: Nov 24, 1992
Filed: Apr 1, 1991
Inventor
Kathleen S. Laurenzo
Assignee (at issue)
Ethyl Corporation
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.