Granted Patent
Utility
US 5,049,161 · App. 07/360,577
Mixtures of dicyanobenzanthrone compounds
Inventor:
Jean-Marie Adam
Patented Case
View Patent ↗
Granted: Sep 17, 1991
Filed: Jun 1, 1989
Inventor
Jean-Marie Adam
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.