Patent US3753764A successfully refreshed from Google Patents.
US3753764A
Expired / Lapsed
US
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Photographic diffusion transfer product and process
Assignee: Eastman Kodak Co
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Filing: 1970-11-19
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Granted: 1973-08-21
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Expires: 1990-11-19
Abstract
Abstract A receiving sheet for use in a diffusion transfer process comprises a polyolefin surface such as polyethylene over which is coated a cellulose ester layer such as cellulose triacetate, an acid layer such as polyacrylic acid, a timing layer and an image receiving layer. The image receiving layer can be a nucleated layer for use in black-and-white diffusion transfer or a mordanted layer for use in color diffusion transfer.
Inventors
- 👤 J Haefner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:02
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/42; G03C8/52; G03C8/24; G03C8/26; G03C8/28; Y; Y10; Y10S; Y10S430/00; Y10S430/142
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
13 words
An element of claim 1 in which said image receiving layer comprises gelatin.
Claim 2
Dependent Claim
14 words
An element of claim 1 in which said image receiving layer comprises polyvinyl alcohol.
Claim 3
Dependent Claim
14 words
An element of claim 1 in which said image receiving layer contains palladium nuclei.
Claim 4
Dependent Claim
39 words
An element of claim 1 in whiCh said polyolefin is coated on a paper support having on a back side of said support a layer of black polyethylene and superimposed over the black polyethylene a layer of white polyethylene.
Claim 5
Dependent Claim
50 words
An element of claim 1 in which said acid layer comprises at least sufficient acid groups to effect a reduction in the pH of said image layer from a pH of 13 to a pH of at least 11 at the end of an imbibition period of about 60 seconds.
References Cited (Backward Citations)
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |