Granted Patent
Utility
US 4,933,271 · App. 07/251,081
Stabilizers for color photography recording materials
Inventors:
Jean Rody, David G. Leppard
Patented Case
View Patent ↗
Granted: Jun 12, 1990
Filed: Sep 29, 1988
Inventors
Jean Rody
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.