Granted Patent
Utility
US 5,288,858 · App. 07/914,176
Diazo dyes containing a hydroxy alkoxybenzene middle component and a pyrazole coupling component
Inventor:
Jurgen Schaetzer
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Jul 14, 1992
Inventor
Jurgen Schaetzer
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.