Granted Patent
Utility
US 4,777,248 · App. 06/813,777
Water-soluble non-reactive triazinyl mono-azo dye for ink jet printing
Patented Case
View Patent ↗
Granted: Oct 11, 1988
Filed: Dec 27, 1985
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.