Granted Patent
Utility
US 5,202,458 · App. 07/740,587
Stabilizers for color photographic recording materials
Inventor:
David G. Leppard
Patented Case
View Patent ↗
Granted: Apr 13, 1993
Filed: Aug 5, 1991
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.