Granted Patent
Utility
US 4,680,247 · App. 06/846,587
Photographic processing composition with poly(diacetone acrylamide) oxime and styrene-butadiene latex
Inventor:
Richard J. Murphy
Patented Case
View Patent ↗
Granted: Jul 14, 1987
Filed: Mar 31, 1986
Inventor
Richard J. Murphy
Assignee (at issue)
Polaroid Corporation, Patent Dept.
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.