Granted Patent
Utility
US 4,448,780 · App. 06/414,602
N-(Lower-alkyl)-N'-[5-(pyridinyl)-2-pyridinyl]ureas and cardiotonic use thereof
Inventor:
George Y. Lesher
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Sep 3, 1982
Inventor
George Y. Lesher
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.