Granted Patent
Utility
US 4,369,318 · App. 06/169,709
Process for the production of colored photographic images by the silver dye-bleach process
Inventor:
Gerald Jan
Patented Case
View Patent ↗
Granted: Jan 18, 1983
Filed: Jul 17, 1980
Inventor
Gerald Jan
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.