Granted Patent
Utility
US 4,518,679 · App. 06/557,366
Color-photographic recording material
Inventors:
David G. Leppard, Jean Rody
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: Dec 2, 1983
Inventors
David G. Leppard
Jean Rody
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.