US3647440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic diffusion transfer product and process
Assignee: Eastman Kodak Co
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Filing: 1969-02-04
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Granted: 1972-03-07
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Expires: 1989-02-04
Abstract
Abstract A receiving layer for use in the photographic diffusion transfer process comprises finely divided nonsilver noble metal nuclei obtained by reducing a metal salt in the presence of a colloid with a reducing agent having a standard potential more negative than -0.30. The nuclei typically have an average particle size in the range of about 15 A. to about 65 A., at least 80 percent, by number, of the nuclei having a particle size in the range of about 20 A. to about 50 A. The receiving layers can be on a support such as paper or film base.
Inventors
- 👤 Arthur A Rasch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:29
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/24; G03C8/26; G03C8/28
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
14 words
A receiving element comprising a support having thereon said receiving layer of claim 1.
Claim 2
Dependent Claim
13 words
A receiving element according to claim 2 in which said support is paper.
Claim 3
Dependent Claim
27 words
A receiving element according to claim 2 in which said nuclei are coated on said support in an amount of about 1 to about 200 Mu g./ft.2.
Claim 4
Dependent Claim
13 words
A receiving element according to claim 2 in which said colloid is gelatin.
Claim 5
Dependent Claim
27 words
A photographic element comprising a support having thereon said receiving layer of claim 1 and having over said layer an overcoat of a photographic silver halide emulsion.
Claim 6
Dependent Claim
13 words
A receiving element of claim 2 in which said metal nuclei are palladium
Claim 7
Dependent Claim
15 words
A receiving element according to claim 2 in which said support is photographic film base.
Claim 8
Dependent Claim
83 words
A photographic element comprising a image in a receiving layer on a support, said silver image obtained by a silver ion diffusion transfer process, said receiving layer comprising a colloid binder and nonsilver noble metal nuclei, substantially all nuclei in said layer having a particle size in the range of about 15 A. to about 65 A. and about 80 percent of the total number of said nuclei having a particle size in the range of about 20 A. to about 50 A.
Claim 9
Dependent Claim
52 words
A receiving layer for use in the diffusion transfer process comprising a reaction product obtained by forming finely divided nonsilver noble metal nuclei from a salt of said metal by reducing said metal salt, in the presence of a colloid, with a reducing agent having a standard potential more negative than -0.30.
Claim 10
Dependent Claim
17 words
A receiving layer of claim 10 in which said reducing agent is a hypophosphite or a borohydride.
Claim 11
Dependent Claim
14 words
A receiving layer of claim 10 in which said metal salt is palladium chloride.
Claim 12
Dependent Claim
14 words
A receiving layer of claim 10 in which said metal salt is palladium nitrate.
Claim 13
Dependent Claim
14 words
A receiving layer of claim 10 in which said metal salt is ammoniuM chloroplatinate.
Claim 14
Dependent Claim
16 words
A receiving layer of claim 10 which comprises a gelatin polymeric latex vehicle for said nuclei.
Claim 15
Dependent Claim
24 words
A receiving layer of claim 15 in which said vehicle is prepared from a monomeric mixture containing acrylonitrile, vinylidene chloride, acrylic acid with gelatin.
Claim 16
Dependent Claim
14 words
A receiving layer of claim 10 in which said metal salt is sodium chloropallidate.
Claim 17
Dependent Claim
26 words
A receiving layer of claim 10 in which said nuclei are coated in an amount in the range of about 1 to about 200 Mu g./ft.2.
Claim 18
Dependent Claim
14 words
A receiving layer of claim 10 which comprises a gelatin vehicle for said nuclei.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |