Granted Patent
Utility
US 4,866,074 · App. 07/255,728
Naphtheridinone- and pyridooxazinone-pyridone compounds, cardiotonic compositions including same, and their uses
Inventors:
Alfred P. Spada, William L. Studt, Henry F. Campbell, Donald E. Kuhla, Thomas J. Tucker
Patented Case
View Patent ↗
Granted: Sep 12, 1989
Filed: Oct 11, 1988
Inventors
Alfred P. Spada
William L. Studt
Henry F. Campbell
Donald E. Kuhla
Thomas J. Tucker
Assignee (at issue)
Rorer Pharmaceutical Corporation
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.