Granted Patent
Utility
US 4,360,590 · App. 06/184,567
Photographic material
Inventor:
Ivan Tomka
Patented Case
View Patent ↗
Granted: Nov 23, 1982
Filed: Sep 5, 1980
Inventor
Ivan Tomka
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.