Granted Patent
Utility
US 5,449,586 · App. 08/335,675
Diffusion transfer integral film unit
Inventors:
F. Richard Cottrell, Andrew K. Juenger, Hugh R. MacKenzie, William J. McCune, Jr., William T. Plummer
Patented Case
View Patent ↗
Granted: Sep 12, 1995
Filed: Nov 8, 1994
Inventors
F. Richard Cottrell
Andrew K. Juenger
Hugh R. MacKenzie
William J. McCune, Jr.
William T. Plummer
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.