Granted Patent
Utility
US 4,880,916 · App. 07/172,684
Cationic azo dyes containing 2(p-aminophenyl)oxazolo [4,5-b]pyridines and similar compounds as diazo components
Inventor:
Jean-Marie Adam
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Mar 24, 1988
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.