Granted Patent
Utility
US 4,806,554 · App. 07/141,852
Pyrazol and indazolpyridinamines
Inventors:
Richard C. Effland, Joseph T. Klein
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Jan 11, 1988
Inventors
Richard C. Effland
Joseph T. Klein
Assignee (at issue)
Hoechst Roussel Pharmaceuticals
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.