Granted Patent
Utility
US 5,010,190 · App. 07/192,316
Cationic compounds
Inventor:
Willy Stingelin
Patented Case
View Patent ↗
Granted: Apr 23, 1991
Filed: May 9, 1988
Inventor
Willy Stingelin
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.