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