Granted Patent
Utility
US 4,297,362 · App. 06/173,003
4-(3,4-Diaminophenyl)pyridine or salts, and use thereof as cardiotonic
Inventors:
George Y. Lesher, Baldev Singh
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Jul 28, 1980
Inventors
George Y. Lesher
Baldev Singh
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.