Granted Patent
Utility
US 5,147,756 · App. 07/684,132
Stabilized, aqueous hydrazide solutions for photographic elements
Inventor:
Ludovic Fodor
Patented Case
View Patent ↗
Granted: Sep 15, 1992
Filed: Apr 11, 1991
Inventor
Ludovic Fodor
Assignee (at issue)
E.I. DU PONT DE NEMOURS AND COMPANY
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.