US4137079A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antifoggants in heat developable photographic materials
Assignee: Eastman Kodak Co
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Filing: 1978-04-03
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Granted: 1979-01-30
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Expires: 1998-04-03
Abstract
Abstract A heat developable photographic material for producing a dye enhanced silver image comprising, in binder, in reactive association, (a) photosensitive silver halide, (b) a dye-forming coupler, (c) an oxidation-reduction image-forming combination comprising (i) a 3-amino-1H-1,2,4-triazole silver salt oxidizing agent, with (ii) an organic reducing agent which in its oxidized form forms a dye with the dye-forming coupler, and (d) an antifoggant concentration of a 5-mercapto-1,2,4-triazole antifoggant, provides developed, dye enhanced silver images with reduced fog upon processing. An image can be developed in this photographic material by merely heating the material. Other addenda employed in heat developable photographic materials, such as sensitizing dyes, can be useful with the described photographic materials.
Inventors
- 👤 Conrad G. Houle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; G03C1/005; G03C1/06; G03C1/34; G03C1/346
Claims Analysis
Total Claims: 41
Claim 1
Independent Claim
129 words
In a heat developable photographic element for providing a dye enhanced silver image comprising a support having thereon, in binder, in reactive association, (a) photosensitive silver halide, (b) a dye-forming coupler, and (c) an oxidation-reduction image-forming combination comprising (i) a 3-amino-1H-1,2,4-triazole silver salt oxidizing agent consisting essentially of a silver salt of a 3-amino-1H-1,2,4-triazole represented by the structure ##STR6## wherein Y is aryl containing 6 to 12 carbon atoms; n is 0 to 2; and Z is hydrogen, hydroxyl or amine, with (ii) an organic reducing agent which in its oxidized form forms a dye with a dye-forming coupler, the improvement wherein said element comprises (d) an antifoggant concentration of a 5-mercapto-1,2,4-triazole represented by the formula: ##STR7## wherein R is H or alkyl containing 1 to 3 carbon atoms.
Claim 2
Dependent Claim
129 words
In a heat developable photographic element for providing a dye enhanced silver image comprising a support having thereon, in binder, in reactive association, (a) photosensitive silver halide, (b) a dye-forming coupler, and (c) an oxidation-reduction image-forming combination comprising (i) a 3-amino-1H-1,2,4-triazole silver salt oxidizing agent consisting essentially of a silver salt of a 3-amino-1H-1,2,4-triazole represented by the structure ##STR6## wherein Y is aryl containing 6 to 12 carbon atoms; n is 0 to 2; and Z is hydrogen, hydroxyl or amine, with (ii) an organic reducing agent which in its oxidized form forms a dye with a dye-forming coupler, the improvement wherein said element comprises (d) an antifoggant concentration of a 5-mercapto-1,2,4-triazole represented by the formula: ##STR7## wherein R is H or alkyl containing 1 to 3 carbon atoms.
Claim 3
Dependent Claim
34 words
A heat developable photographic element as in claim 1 wherein said antifoggant concentration is within the range of about 5.5 mg to about 110 mg of said 5-mercapto-1,2,4-triazole per square meter of said support.
Claim 4
Dependent Claim
16 words
A heat developable photographic element as in claim 1 wherein said 5-mercapto-1,2,4-triazole consists essentially of 3-methyl-5-mercapto-1,2,4-triazole.
Claim 5
Dependent Claim
20 words
A heat developable photographic element as in claim 1 wherein (a) consists essentially of a photosensitive gelatino silver bromoiodide emulsion.
Claim 6
Dependent Claim
26 words
A heat developable photographic element as in claim 1 wherein said improvement also comprises in said element a development accelerating concentration of a 5-thiourazole development accelerator.
Claim 7
Dependent Claim
47 words
A heat developable photographic element as in claim 1 wherein said improvement also comprises in said element a development accelerating concentration of a 5-thiourazole development accelerator within the range of about 5.0 mg to about 220 mg of said development accelerator per square meter of said support.
Claim 8
Dependent Claim
30 words
A heat developable photographic element as in claim 1 wherein said improvement also comprises in said element a development accelerating concentration of a 5-thiourazole development accelerator consisting essentially of 3-imino-4-phenyl-5-thiourazole.
Claim 9
Dependent Claim
43 words
A heat developable photographic element as in claim 1 wherein said improvement also comprises in said element a development accelerating concentration of 3-imino-4-phenyl-5-thiourazole within the range of about 5.0 mg to about 220 mg of said thiourazole per square meter of said support.
Claim 10
Dependent Claim
26 words
A heat developable photographic element as in claim 1 wherein said improvement also comprises in said element a development accelerating concentration of a 2-tetrazoline-5-thione development accelerator.
Claim 11
Dependent Claim
23 words
A heat developable photographic element as in claim 1 wherein said improvement also comprises in said element a development accelerating concentration of 1-phenyl-2-tetrazoline-5-thione.
Claim 12
Dependent Claim
43 words
A heat developable photographic element as in claim 1 wherein said improvement also comprises in said element a development accelerating concentration of 1-phenyl-2-tetrazoline-5-thione within the range of about 5.5 mg to about 220 mg of said 5-thione per square meter of said support.
Claim 13
Dependent Claim
30 words
A heat developable photographic element as in claim 1 wherein said improvement also comprises in said element a development accelerating concentration of a 5-mercapto-1,2,4-triazole development accelerator consisting essentially of 4-methyl-5-mercapto-1,2,4-triazole.
Claim 14
Dependent Claim
43 words
A heat developable photographic element as in claim 1 wherein said improvement also comprises in said element a development accelerating concentration of 4-methyl-5-mercapto-1,2,4-triazole within the range of about 5.5 mg to about 220 mg of said 1,2,4-triazole per square meter of said support.
Claim 15
Dependent Claim
21 words
A heat developable photographic element as in claim 1 wherein said silver halide is spectrally sensitized with a spectral sensitizing dye.
Claim 16
Dependent Claim
74 words
In a heat developable photographic element for providing a dye enhanced silver image comprising a support having thereon, in a gelatino binder, in reactive association, (a) photosensitive silver halide gelatino emulsion, (b) an oxidation-reduction image-forming combination comprising (i) a 3-amino-5-benzylthio-1H-1,2,4-triazole silver salt, with (ii) a phenylenediamine reducing agent consisting essentially of 4-amino-2-methoxy-N,N,5-trimethylaniline sulfate, (c) a resorcinol dye-forming coupler consisting essentially of 2',6'-dihydroxytrifluoroacetanilide, the improvement wherein said element comprises (d) an antifoggant concentration of 3-methyl-5-mercapto-1,2,4-triazole.
Claim 17
Dependent Claim
74 words
In a heat developable photographic element for providing a dye enhanced silver image comprising a support having thereon, in a gelatino binder, in reactive association, (a) photosensitive silver halide gelatino emulsion, (b) an oxidation-reduction image-forming combination comprising (i) a 3-amino-5-benzylthio-1H-1,2,4-triazole silver salt, with (ii) a phenylenediamine reducing agent consisting essentially of 4-amino-2-methoxy-N,N,5-trimethylaniline sulfate, (c) a resorcinol dye-forming coupler consisting essentially of 2',6'-dihydroxytrifluoroacetanilide, the improvement wherein said element comprises (d) an antifoggant concentration of 3-methyl-5-mercapto-1,2,4-triazole.
Claim 18
Dependent Claim
22 words
A heat developable photographic element as in claim 15 wherein said silver halide emulsion is spectrally sensitized with a spectral sensitizing dye.
Claim 19
Dependent Claim
23 words
A heat developable photographic element as in claim 15 wherein said improvement also comprises in said element a development accelerating concentration of 1-phenyl-2-tetrazoline-5-thione.
Claim 20
Dependent Claim
23 words
A heat developable photographic element as in claim 15 wherein said improvement also comprises in said element a development accelerating concentration of 3-imino-4-phenyl-5-thiourazole.
Claim 21
Dependent Claim
23 words
A heat developable photographic element as in claim 15 wherein said improvement also comprises in said element a development accelerating concentration of 4-methyl-5-mercapto-1,2,4-triazole.
Claim 22
Dependent Claim
115 words
In a heat developable photographic composition comprising, in binder, (a) photosensitive silver halide, (b) a dye-forming coupler, and (c) an oxidation-reduction image-forming combination comprising (i) a 3-amino-1H-1,2,4-triazole silver salt oxidizing agent consisting essentially of a silver salt of a 3-amino-1H-1,2,4-triazole represented by the structure ##STR8## wherein Y is aryl containing 6 to 12 carbon atoms; n is 0 to 2; and Z is hydrogen, hydroxyl or amine, with (ii) an organic reducing agent which in its oxidized form forms a dye with a dye-forming coupler, the improvement wherein said composition comprises (d) an antifoggant concentration of a 5-mercapto-1,2,4-triazole represented by the formula: ##STR9## wherein R is H or alkyl containing 1 to 3 carbon atoms.
Claim 23
Dependent Claim
115 words
In a heat developable photographic composition comprising, in binder, (a) photosensitive silver halide, (b) a dye-forming coupler, and (c) an oxidation-reduction image-forming combination comprising (i) a 3-amino-1H-1,2,4-triazole silver salt oxidizing agent consisting essentially of a silver salt of a 3-amino-1H-1,2,4-triazole represented by the structure ##STR8## wherein Y is aryl containing 6 to 12 carbon atoms; n is 0 to 2; and Z is hydrogen, hydroxyl or amine, with (ii) an organic reducing agent which in its oxidized form forms a dye with a dye-forming coupler, the improvement wherein said composition comprises (d) an antifoggant concentration of a 5-mercapto-1,2,4-triazole represented by the formula: ##STR9## wherein R is H or alkyl containing 1 to 3 carbon atoms.
Claim 24
Dependent Claim
33 words
A heat developable photographic composition as in claim 20 wherein said antifoggant concentration is within the range of 0.45 g to 9 g of said 5-mercapto-1,2,4-triazole per mole of silver in said composition.
Claim 25
Dependent Claim
16 words
A heat developable photographic composition as in claim 20 wherein said mercapto-1,2,4-triazole consists essentially of 3-methyl-5-mercapto-1,2,4-triazole.
Claim 26
Dependent Claim
20 words
A heat developable photographic composition as in claim 20 wherein (a) consists essentially of a photosensitive gelatino silver bromoiodide emulsion.
Claim 27
Dependent Claim
21 words
A heat developable photographic composition as in claim 20 wherein said silver halide is spectrally sensitized with a spectral sensitizing dye.
Claim 28
Dependent Claim
20 words
A heat developable photographic composition as in claim 20 also comprising a development accelerating concentration of a 5-thiourazole development accelerator.
Claim 29
Dependent Claim
30 words
A heat developable photographic composition as in claim 20 wherein said improvement also comprises in said composition a development accelerating concentration of a 5-thiourazole development accelerator consisting essentially of 3-imino-4-phenyl-5-thiourazole.
Claim 30
Dependent Claim
26 words
A heat developable photographic composition as in claim 20 wherein said improvement also comprises in said composition a development accelerating concentration of a 2-tetrazoline-5-thione development accelerator.
Claim 31
Dependent Claim
23 words
A heat developable photographic composition as in claim 20 wherein said improvement also comprises in said composition a development accelerating concentration of 1-phenyl-2-tetrazoline-5-thione.
Claim 32
Dependent Claim
30 words
A heat developable photographic composition as in claim 20 wherein said improvement also comprises in said composition a development accelerating concentration of a 5-mercapto-1,2,4-triazole development accelerator consisting essentially of 4-methyl-5-mercapto-1,2,4-triazole.
Claim 33
Dependent Claim
68 words
In a heat developable photographic composition for providing a dye enhanced silver image comprising, in a gelatino binder, (a) photosensitive silver halide gelatino emulsion, (b) an oxidation-reduction image-forming combination comprising (i) a 3-amino-5-benzylthio-1H-1,2,4-triazole silver salt, with (ii) a phenylenediamine reducing agent consisting essentially of 4-amino-2-methoxy-N,N,5-trimethylaniline sulfate, and (c) a resorcinol dye-forming coupler consisting essentially of 2',6'-dihydroxytrifluoroacetanilide, the improvement wherein said composition comprises (d) an antifoggant concentration of 3-methyl-5-mercapto-1,2,4-triazole.
Claim 34
Dependent Claim
68 words
In a heat developable photographic composition for providing a dye enhanced silver image comprising, in a gelatino binder, (a) photosensitive silver halide gelatino emulsion, (b) an oxidation-reduction image-forming combination comprising (i) a 3-amino-5-benzylthio-1H-1,2,4-triazole silver salt, with (ii) a phenylenediamine reducing agent consisting essentially of 4-amino-2-methoxy-N,N,5-trimethylaniline sulfate, and (c) a resorcinol dye-forming coupler consisting essentially of 2',6'-dihydroxytrifluoroacetanilide, the improvement wherein said composition comprises (d) an antifoggant concentration of 3-methyl-5-mercapto-1,2,4-triazole.
Claim 35
Dependent Claim
23 words
A heat developable photographic composition as in claim 30 wherein said improvement also comprises in said composition a development accelerating concentration of 1-phenyl-2-tetrazoline-5-thione.
Claim 36
Dependent Claim
23 words
A heat developable photographic composition as in claim 30 wherein said improvement also comprises in said composition a development accelerating concentration of 3-imino-4-phenyl-5-thiourazole.
Claim 37
Dependent Claim
23 words
A heat developable photographic composition as in claim 30 wherein said improvement also comprises in said composition a development accelerating concentration of 4-methyl-5-mercapto-1,2,4-triazole.
Claim 38
Dependent Claim
149 words
A process of developing a dye enhanced silver image in an exposed heat developable photographic element comprising a support having thereon, in binder, in reactive association, (a) photosensitive silver halide, (b) a dye-forming coupler, (c) an oxidation-reduction image-forming combination comprising (i) a 3-amino-1H-1,2,4-triazole silver salt oxidizing agent consisting essentially of a silver salt of a 3-amino-1H-1,2,4-triazole represented by the structure ##STR10## wherein Y is aryl containing 6 to 12 carbon atoms; n is 0 to 2; and Z is hydrogen, hydroxyl or amine, with (ii) an organic reducing agent which in its oxidized form forms a dye with a dye-forming coupler, and (d) an antifoggant concentration of a 5-mercapto-1,2,4-triazole represented by the formula: ##STR11## wherein R is H or alkyl containing 1 to 3 carbon atoms, comprising heating said element to a temperature within the range of about 120° C to about 185° C until said image is developed.
Claim 39
Dependent Claim
149 words
A process of developing a dye enhanced silver image in an exposed heat developable photographic element comprising a support having thereon, in binder, in reactive association, (a) photosensitive silver halide, (b) a dye-forming coupler, (c) an oxidation-reduction image-forming combination comprising (i) a 3-amino-1H-1,2,4-triazole silver salt oxidizing agent consisting essentially of a silver salt of a 3-amino-1H-1,2,4-triazole represented by the structure ##STR10## wherein Y is aryl containing 6 to 12 carbon atoms; n is 0 to 2; and Z is hydrogen, hydroxyl or amine, with (ii) an organic reducing agent which in its oxidized form forms a dye with a dye-forming coupler, and (d) an antifoggant concentration of a 5-mercapto-1,2,4-triazole represented by the formula: ##STR11## wherein R is H or alkyl containing 1 to 3 carbon atoms, comprising heating said element to a temperature within the range of about 120° C to about 185° C until said image is developed.
Claim 40
Dependent Claim
95 words
A process of developing a dye enhanced silver image in an exposed heat developable photographic element comprising a support having thereon, in a gelatino binder, in reactive association, (a) photosensitive silver halide gelatino emulsion, (b) an oxidation-reduction image-forming combination comprising (i) a 3-amino-5-benzylthio-1H-1,2,4-triazole silver salt, with (ii) a phenylenediamine reducing agent consisting essentially of 4-amino-2-methoxy-N,N,5-trimethylaniline sulfate, (c) a resorcinol dye-forming coupler consisting essentially of 2',6'-dihydroxytrifluoroacetanilide, and (d) an antifoggant concentration of 3-methyl-5-mercapto-1,2,4-triazole, comprising heating said element to a temperature within the range of about 120° C to about 185° C until said image is developed.
Claim 41
Dependent Claim
95 words
A process of developing a dye enhanced silver image in an exposed heat developable photographic element comprising a support having thereon, in a gelatino binder, in reactive association, (a) photosensitive silver halide gelatino emulsion, (b) an oxidation-reduction image-forming combination comprising (i) a 3-amino-5-benzylthio-1H-1,2,4-triazole silver salt, with (ii) a phenylenediamine reducing agent consisting essentially of 4-amino-2-methoxy-N,N,5-trimethylaniline sulfate, (c) a resorcinol dye-forming coupler consisting essentially of 2',6'-dihydroxytrifluoroacetanilide, and (d) an antifoggant concentration of 3-methyl-5-mercapto-1,2,4-triazole, comprising heating said element to a temperature within the range of about 120° C to about 185° C until said image is developed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-01-29 | 1982-07-31 | 1983-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-29 | 1986-07-31 | 1987-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-29 | 1990-07-31 | 1991-01-30 | $7700.00 | Window Closed / Lapsed |