Granted Patent
Utility
US 4,716,170 · App. 06/913,910
5-[1H-(5-membered-N-aromatic heteryl)-1-yl]-1,6-naphthyridin-2(1H)-ones and their cardiotonic use
Inventors:
George Y. Lesher, Baldev Singh
Patented Case
View Patent ↗
Granted: Dec 29, 1987
Filed: Oct 1, 1986
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.