Granted Patent
Utility
US 4,493,546 · App. 06/473,084
Processing apparatus and method for treating a film unit with a liquid
Inventor:
David Cronin
Patented Case
View Patent ↗
Granted: Jan 15, 1985
Filed: Mar 7, 1983
Inventor
David Cronin
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.