Granted Patent
Utility
US 4,789,674 · App. 07/065,800
Bi-2H-pyrroli(di)nediones
Inventor:
Romeo Paioni
Patented Case
View Patent ↗
Granted: Dec 6, 1988
Filed: Jun 24, 1987
Inventor
Romeo Paioni
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.