Granted Patent
Utility
US 5,268,263 · App. 08/017,161
Photographic elements with improved coating layers
Inventors:
Jose Esteban Valentini, Jose Manuel Rodriguez-Parada
Patented Case
View Patent ↗
Granted: Dec 7, 1993
Filed: Feb 22, 1993
Inventors
Jose Esteban Valentini
Jose Manuel Rodriguez-Parada
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.