Granted Patent
Utility
US 5,176,972 · App. 07/757,910
Imaging medium with low refractive index layer
Inventors:
Iris B. K. Bloom, Richard A. Minns, William T. Plummer
Patented Case
View Patent ↗
Granted: Jan 5, 1993
Filed: Sep 11, 1991
Inventors
Iris B. K. Bloom
Richard A. Minns
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.