Granted Patent
Utility
US 4,225,601 · App. 06/073,885
3-Hydroxy or hydroxymethyl-5-(4-pyridinyl)2(1H)-pyridinones, useful as cardiotonic agents and their preparation
Inventors:
George Y. Lesher, Chester J. Opalka, Jr.
Patented Case
View Patent ↗
Granted: Sep 30, 1980
Filed: Sep 10, 1979
Inventors
George Y. Lesher
Chester J. Opalka, Jr.
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.