Granted Patent
Utility
US 4,954,563 · App. 06/584,176
Monoazo dyes containing sulfoindole coupling components
Inventor:
Rudolf Hurter
Patented Case
View Patent ↗
Granted: Sep 4, 1990
Filed: Feb 27, 1984
Inventor
Rudolf Hurter
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.