Granted Patent
Utility
US 4,452,523 · App. 06/391,703
Method of and apparatus for processing film
Inventor:
Lawrence M. Douglas
Patented Case
View Patent ↗
Granted: Jun 5, 1984
Filed: Jun 24, 1982
Inventor
Lawrence M. Douglas
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.