US3753764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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 08:19
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)
US2584030A
Cited
US2789054A
Cited
US3265505A
Cited
US3419389A
Cited
US3421893A
Cited
US3682639A
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 |