Granted Patent
Utility
US 4,379,819 · App. 06/258,263
Color-photographic recording material for the silver dye bleach process
Inventors:
John Lenoir, Gerald Jan, Mario Fryberg
Patented Case
View Patent ↗
Granted: Apr 12, 1983
Filed: Apr 28, 1981
Inventors
John Lenoir
Gerald Jan
Mario Fryberg
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.