Granted Patent
Utility
US 4,458,001 · App. 06/454,448
.beta.-Eliminating polymers for diffusion control in photographic products
Inventor:
Lloyd D. Taylor
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Dec 29, 1982
Inventor
Lloyd D. Taylor
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.