Granted Patent
Utility
US 5,328,799 · App. 08/079,146
Thermographic and photothermographic imaging materials
Inventors:
James R. Freedman, Stephen R. Sofen, Kent M. Young
Patented Case
View Patent ↗
Granted: Jul 12, 1994
Filed: Jun 17, 1993
Inventors
James R. Freedman
Stephen R. Sofen
Kent M. Young
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.