Granted Patent
Utility
US 5,817,887 · App. 08/385,026
Color-photographic recording material
Inventors:
David G. Leppard, Hugh Stephen Laver
Patented Case
View Patent ↗
Granted: Oct 6, 1998
Filed: Feb 7, 1995
Inventors
David G. Leppard
Hugh Stephen Laver
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.