Granted Patent
Utility
US 5,364,749 · App. 07/891,532
Photographic material containing UV absorber
Inventors:
David G. Leppard, Kurt Burdeska, Mario Slongo
Patented Case
View Patent ↗
Granted: Nov 15, 1994
Filed: Jun 1, 1992
Inventors
David G. Leppard
Kurt Burdeska
Mario Slongo
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.