Granted Patent
Utility
US 4,310,531 · App. 06/209,416
5-(Pyridinyl)-benzoxazol-2(3H)-ones and their use as cardiotonics
Inventors:
George Y. Lesher, Baldev Singh
Patented Case
View Patent ↗
Granted: Jan 12, 1982
Filed: Nov 24, 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.