Granted Patent
Utility
US 4,386,150 · App. 06/331,995
Novel image dye-providing materials and photographic products and processes
Inventors:
Stephen Robert Herchen, Gary N. Widiger
Patented Case
View Patent ↗
Granted: May 31, 1983
Filed: Dec 18, 1981
Inventors
Stephen Robert Herchen
Gary N. Widiger
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.