Granted Patent
Utility
US 4,294,837 · App. 06/135,105
1,3-Dihydro-6-(pyridinyl)-2H-imidazo[4,5-b]pyridin-2-ones and -imidazo[4,5-b]pyridine-2-thiones and their cardiotonic use
Inventors:
George Y. Lesher, Chester J. Opalka, Jr., Donald F. Page
Patented Case
View Patent ↗
Granted: Oct 13, 1981
Filed: Mar 28, 1980
Inventors
George Y. Lesher
Chester J. Opalka, Jr.
Donald F. Page
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.