Granted Patent
Utility
US 4,302,462 · App. 06/175,283
4(or 3)-(3,4-Dihydroxyphenyl)pyridines, their cardiotonic use and cardiotonic use of their methyl ethers
Inventors:
Joseph C. Collins, George Y. Lesher, Baldev Singh
Patented Case
View Patent ↗
Granted: Nov 24, 1981
Filed: Aug 4, 1980
Inventors
Joseph C. Collins
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.