Patent US3856524A successfully refreshed from Google Patents.
US3856524A
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Photographic elements and processes for providing tanned image records
Assignee: Eastman Kodak Co
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Filing: 1972-12-04
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Granted: 1974-12-24
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Expires: 1992-12-04
Abstract
Abstract Photographic elements are disclosed which comprise a support having thereon a light-sensitive photographic metal salt and a hydrophilic colloid wherein said element also contains a cobalt(III) ion complex. In one aspect, the photographic element contains an unhardened hydrophilic colloid such as gelatin and a cobalt(III) ion complex in a concentration of at least 0.5% by weight of unhardened hydrophilic colloid based on cobalt. In another aspect, a process of producing tanned image records is disclosed wherein a photographic element containing an imagewise distribution of a metal and an unhardened hydrophilic colloid is processed with a liquid composition comprising a cobalt(III) ion complex at a pH of above 10 wherein the hydrophilic colloid is tanned imagewise.
Inventors
- 👤 V Bissonette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:42
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/67; G03C1/005; G03C1/06; G03C1/42; G03C1/50; G03C5/00; G03C5/26; G03C5/29; G03C5/30; G03C5/315; G03C5/40; G03C5/42; G03C5/58; G03C7/00; G03C7/30; G03C7/3017; G03C7/3018; G03C8/00; G03C8/02; G03C8/08; G03F; G03F7/00; G03F7/004; G03F7/06; Y; Y10; Y10S; Y10S430/00; Y10S430/137
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
16 words
A process according to claim 1 wherein said photographic element comprises an imagewise distribution of silver.
Claim 2
Dependent Claim
21 words
A process according to claim 1 wherein said hydrophilic colloid is a gelatin and said catalytic metal is a noble metal.
Claim 3
Dependent Claim
18 words
A process according to claim 1 wherein said cobalt (III) ion complex has a net charge of +3.
Claim 4
Dependent Claim
18 words
A process according to claim 1 wherein said cobalt (III) ion complex comprises at least three ammino ligands.
Claim 5
Dependent Claim
20 words
A process according to claim 1 where said liquid composition has a pH of from about 11 to about 13.
Claim 6
Dependent Claim
19 words
A process according to claim 1 wherein said catalytic metal is a metal of Groups Ib, VIa or VIII.
Claim 7
Dependent Claim
22 words
A process according to claim 1 wherein said metal is silver and said cobalt (III) ion complex is a cobaltic hexammine complex.
Claim 8
Dependent Claim
67 words
A process for providing an imagewise distribution of a hardened hydrophilic colloid in a photographic element which comprises at least one layer containing an imagewise distribution of silver and at least one layer containing an unhardened hydrophilc colloid, said process comprising effecting contact of said photographic element with a solution containing a cobalt (III) ion complex wherein said solution has a pH of at least about 11.
Claim 9
Dependent Claim
12 words
A process according to claim 9 wherein said hydrophilic colloid is gelatin.
Claim 10
Dependent Claim
18 words
A process according to claim 9 wherein said cobalt (III) ion complex comprises at least three amino ligands.
Claim 11
Dependent Claim
101 words
A process of providing an imagewise distribution of tanned hydrophilic colloid in a photographic element containing an imagewise-exposed silver halide emulsion, at least one layer containing a cobalt (III) ion complex and at least one layer containing an unhardened hydrophilic colloid, said process comprising the steps of developing said photographic element with a silver halide developing agent to produce an imagewise distribution of silver therein and effecting contact of said photographic element with a liquid composition containing a cobalt (III) ion complex wherein said liquid has a pH of at least above 10, whereby said unhardened hydrophilic colloid is tanned imagewise.
Claim 12
Dependent Claim
32 words
A process according to claim 12 wherein said photographic element contains an incorporated silver halide developing agent and said development is carried out by contacting said photographic element with an alkaline solution.
Claim 13
Dependent Claim
19 words
A process according to claim 12 wherein said liquid has a pH of from about 11 to about 13.
Claim 14
Dependent Claim
18 words
A process according to claim 14 wherein said cobalt (III) ion complex contains at least three ammino ligands.
Claim 15
Dependent Claim
40 words
A process according to claim 14 wherein said photographic element is maintained in contact with said liquid for a time sufficient to produce at least an increase of 20* F. in melting point in portions of said unhardened hydrohilic colloid.
Claim 16
Dependent Claim
22 words
A process according to claim 16 wherein said element is washed After contact with said liquid to remove the unhardened hydrophilic colloid.
Claim 17
Dependent Claim
32 words
A process according to claim 12 wherein said liquid composition contains said cobalt (III) ion complex in a concentration of from 10 mg. to about 10 g./l. of solution based on cobalt.
Claim 18
Dependent Claim
43 words
A photographic element comprising a support having thereon at least one layer containing a silver halide emulsion and a hydrophilic colloid wherein said element contains at least 0.5% by weight of said hydrophilic colloid of a cobalt (III) ion complex based on cobalt.
Claim 19
Dependent Claim
17 words
A photographic element according to claim 19 which contains at least one layer which comprises unhardened gelatin.
Claim 20
Dependent Claim
14 words
A photographic element according to claim 19 which contains a silver halide developing agent.
Claim 21
Dependent Claim
19 words
A photographic element according to claim 19 wherein said cobalt (III) ion complex contains at least three ammino ligands.
Claim 22
Dependent Claim
34 words
A photographic element according to claim 19 wherein said cobalt (III) ion complex is present in said element in a concentration of at least 1.0% by weight of unhardened hydrophilic colloid based on cobalt.
Claim 23
Dependent Claim
83 words
A process of providing an imagewise distribution of tanned hydrophilic colloid in a photographic element containing an imagewise-exposed photographic element and at least one layer containing an unhardened hydrophilic colloid, said process comprising the steps of forming an imagewise distribution of a catalytic noble metal in said element and effecting contact of said element with a liquid composition containing a cobalt (III) ion complex wherein said liquid has a pH of at least above 10 whereby said unhardened hydrophilic colloid is tanned imagewise.
Claim 24
Dependent Claim
18 words
A process according to claim 24 wherein said liquid has a pH of about 11 to about 13.
Claim 25
Dependent Claim
46 words
A process according to claim 25 wherein said unhardened hydrophilic colloid is gelatin and said cobalt (III) ion complex comprises at least three ammino ligands and is present in said element in a concentration of at least 0.5% by weight of said gelatin based on cobalt.
References Cited (Backward Citations)
US25885A
Cited
GB777635A
Cited
US2839405A
Cited
US3342598A
Cited
US3551406A
Cited
US3565622A
Cited
US3582322A
Cited
US3656961A
Cited
US3630737A
Cited
US3719492A
Cited
US3748138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |