Granted Patent
Utility
US 4,264,603 · App. 06/131,227
5-(Pyridinyl)-1H-pyrazolo[3,4-b]pyridine-3-amines, their use as cardiotonics and their preparation
Inventors:
George Y. Lesher, Monte D. Gruett
Patented Case
View Patent ↗
Granted: Apr 28, 1981
Filed: Mar 17, 1980
Inventors
George Y. Lesher
Monte D. Gruett
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.