Granted Patent
Utility
US 4,416,971 · App. 06/454,092
Novel xanthene compounds and their photographic use
Inventors:
Alan L. Borror, Louis Cincotta, John Lee
Patented Case
View Patent ↗
Granted: Nov 22, 1983
Filed: Dec 28, 1982
Inventors
Alan L. Borror
Louis Cincotta
John Lee
Assignee (at issue)
Polaroid Corporation
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.