Granted Patent
Utility
US 4,503,139 · App. 06/492,695
Photographic products and processes and novel compounds
Inventors:
James R. Bartels-Keith, Roger A. Boggs, Anthony J. Puttick, Nancy M. Sofen
Patented Case
View Patent ↗
Granted: Mar 5, 1985
Filed: May 9, 1983
Inventors
James R. Bartels-Keith
Roger A. Boggs
Anthony J. Puttick
Nancy M. Sofen
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.