Granted Patent
Utility
US 4,452,884 · App. 06/450,513
Color-photographic recording material
Inventor:
David G. Leppard
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Dec 17, 1982
Inventor
David G. Leppard
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.