US3901714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide emulsions and elements including sensitizers of adamantane structure
Assignee: Eastman Kodak Co
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Filing: 1974-07-29
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Granted: 1975-08-26
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Expires: 1994-07-29
Abstract
Abstract A photographic silver halide emulsion is disclosed which incorporates from 0.1 to 100 mg per mole of silver of a compound containing six imino groups bonded to four phosphorus, arsenic or antimony atoms. The compound incorporated is of adamantane structure and is useful as a sensitizer for the emulsion alone or in combination with known gold and/or sulfur sensitizers. The compound can be employed in combination with an antifoggant, such as an azaindene. Photographic elements incorporating such emulsions are also disclosed.
Inventors
- 👤 Edwin N Oftedahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:56
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/28
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
22 words
IN A PHOTOGRAPHIC SILVER HALIDE EMULSION THE IMPROVEMENT COMPRISING THE INCORPORATION OF A SENSITIZING AMOUNT OF A COMPOUND OF THE STRUCTURAL FORMULA
Claim 2
Dependent Claim
22 words
IN A PHOTOGRAPHIC SILVER HALIDE EMULSION THE IMPROVEMENT COMPRISING THE INCORPORATION OF A SENSITIZING AMOUNT OF A COMPOUND OF THE STRUCTURAL FORMULA
Claim 3
Dependent Claim
35 words
In a photographic silver halide emulsion according to claim 1, the further improvement in which said emulsion is additionally sensitized with a gold sensitizer, a sulfur sensitizer or a combination of gold and sulfur sensitizers.
Claim 4
Dependent Claim
21 words
In a photographic silver halide emulsion according to claim 2, the further improvement in which said emulsion contains an azaindene antifoggant.
Claim 5
Dependent Claim
21 words
In a photographic silver halide emulsion according to claim 3, the further improvement in which said emulsion contains a tetrazaindene antifoggant.
Claim 6
Dependent Claim
22 words
In a photographic silver halide emulsion the improvement comprising the incorporation of a sensitizing amount of a compound of the structural formula
Claim 7
Dependent Claim
22 words
In a photographic silver halide emulsion the improvement comprising the incorporation of a sensitizing amount of a compound of the structural formula
Claim 8
Dependent Claim
21 words
In a photographic silver halide emulsion according to claim 5, the further improvement in which said Group VA element is phosphorus.
Claim 9
Dependent Claim
26 words
In a photographic silver halide emulsion according to claim 6, the further improvement in which R is an alkyl group having 8 or fewer carbon atoms.
Claim 10
Dependent Claim
22 words
In a photographic silver halide emulsion, the improvement comprising the incorporation of a sensitizing amount of a compound having the structural formula
Claim 11
Dependent Claim
22 words
In a photographic silver halide emulsion, the improvement comprising the incorporation of a sensitizing amount of a compound having the structural formula
Claim 12
Dependent Claim
35 words
In a photographic silver halide emulsion, according to claim 8, the further improvement in which said emulsion is additionally sensitized with a gold sensitizer, a sulfur sensitizer or a combination of gold and sulfur sensitizers.
Claim 13
Dependent Claim
21 words
In a photographic silver halide emulsion according to claim 9, the further improvement in which said emulsion contains an azaindene antifoggant.
Claim 14
Dependent Claim
32 words
In a photographic element comprised of a support and, as a coating thereon, a photographic silver halide emulsion layer, the improvement in which said emulsion is as set forth in claim 1.
Claim 15
Dependent Claim
31 words
In a photographic element according to claim 11, the further improvement in which said emulsion includes gold sensitizing means, sulfur sensitizing means, or a combination of gold and sulfur sensitizing means.
Claim 16
Dependent Claim
18 words
In a photographic element according to claim 12, the further improvemEnt in which said emulsion includes antifoggant means.
Claim 17
Dependent Claim
20 words
In a photographic element according to claim 11, the further improvement in which said emulsion includes a phosphorus imide sensitizer.
Claim 18
Dependent Claim
53 words
In a photographic element comprised of a support and, as a coating thereon, a photographic silver halide emulsion layer, the improvement in which said photographic silver halide emulsion includes a sensitizing amount of hexamethyl-2,4,6,8,9,10-hexaaza-1,3,5,7-tetraphosphaadamantane, gold sensitizing means, sulfur sensitizing means or a combination of gold and sulfur sensitizing means, and azaindene antifoggant means.
Claim 19
Dependent Claim
53 words
In a photographic element comprised of a support and, as a coating thereon, a photographic silver halide emulsion layer, the improvement in which said photographic silver halide emulsion includes a sensitizing amount of hexamethyl-2,4,6,8,9,10-hexaaza-1,3,5,7-tetraphosphaadamantane, gold sensitizing means, sulfur sensitizing means or a combination of gold and sulfur sensitizing means, and azaindene antifoggant means.
References Cited (Backward Citations)
US3578449A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-25 | 1979-02-24 | 1979-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-25 | 1983-02-24 | 1983-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-25 | 1987-02-24 | 1987-08-26 | $7700.00 | Window Closed / Lapsed |