Granted Patent
Utility
US 5,409,504 · App. 07/941,597
Process for fixing dyes with UV light
Inventor:
Katharina Fritzsche
Patented Case
View Patent ↗
Granted: Apr 25, 1995
Filed: Sep 8, 1992
Inventor
Katharina Fritzsche
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.