Granted Patent
Utility
US 4,749,795 · App. 07/034,374
Phenyl substituted pyrrolinones
Inventors:
Johannes Pfenninger, Abul Igbal, Alain C. Rochat
Patented Case
View Patent ↗
Granted: Jun 7, 1988
Filed: Apr 6, 1987
Inventors
Johannes Pfenninger
Abul Igbal
Alain C. Rochat
Assignee (at issue)
Ciba-Geigy
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.