Granted Patent
Utility
US 4,868,098 · App. 07/171,917
Method of processing exposed photographic silver dye bleach materials comprising heating after processing liquid application
Inventors:
Rolf Steiger, Urs Furholz
Patented Case
View Patent ↗
Granted: Sep 19, 1989
Filed: Jan 5, 1988
Inventors
Rolf Steiger
Urs Furholz
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.