Granted Patent
Utility
US 4,306,015 · App. 06/172,505
Color photographic material
Inventor:
Norman C. Haylett
Patented Case
View Patent ↗
Granted: Dec 15, 1981
Filed: Jul 28, 1980
Inventor
Norman C. Haylett
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.