Granted Patent
Utility
US 4,886,732 · App. 07/274,400
35 mm self-developing transparency film assemblage
Inventors:
Donald E. Mauchan, Alfred E. Corrigan
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Nov 21, 1988
Inventors
Donald E. Mauchan
Alfred E. Corrigan
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.