Process of washing and protecting photographic silver images, and photographic products thereof
United States Patent 2830900

Inventors:
Land, Edwin H.
Blout, Elkan R.
Haas, Howard C.
Publication Date:
04/15/1958
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Assignee:
POLAROID CORP
Primary Class:
430/18
Other Classes:
430/432, 430/961
International Classes:
G03C11/08; G03C11/00
US Patent References:
2448507Photographic elements having antihalation layer composed of vinylpyridine polymer with vinylpyridine polymer sublayer and outer protective layer
2497546Cerium acetate containing composition
2544906Polyvinyl azine sound track coating