Title:
Opaque permeable polymeric layer in photo-sensitive element
United States Patent 3415645
Inventors:
Land, Edwin H.
Publication Date:
12/10/1968
Export Citation:
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Assignee:
POLAROID CORP
Primary Class:
430/220
Other Classes:
430/212, 430/236
International Classes:
G03C8/44; G03C8/00
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US Patent References:
3376137Color diffusion transfer elements and processes
3345167Photographic compositions, products and processes
3345165Photographic product and process of using same
3330656Novel photographic products and processes
3325283Photographic diffusion transfer products and processes employing image receiving elements containing a layer of polyvinyl pyrrolidone and polyvinyl hydrogen phthalate
3312893Automatic apparatus for measuring resistivity of semiconductors




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