Granted Patent
Utility
US 4,223,149 · App. 06/060,758
Process for producing 3-cyano-5-(pyridinyl)-2(1H)-pyridinones
Inventors:
Chester J. Opalka, Jr., George Y. Lesher
Patented Case
View Patent ↗
Granted: Sep 16, 1980
Filed: Jul 26, 1979
Inventors
Chester J. Opalka, Jr.
George Y. Lesher
Assignee (at issue)
Sterling Drug, 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.