US3985565A
Expired / Lapsed
US
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Photothermographic, composition using a phenolic leuco dye as a reducing agent
Assignee: Eastman Kodak Co
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Filing: 1974-07-12
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Granted: 1976-10-12
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Expires: 1994-07-12
Abstract
Abstract In a photothermographic element, composition or process for producing developed images employing processing with heat, a combination comprising (a) photographic silver halide in association with (b) a silver salt of a long-chain fatty acid and (c) a phenolic leuco dye reducing agent for the silver salt of a long-chain fatty acid provides an image in color. After imagewise exposure of the photothermographic element or composition, a color image can be obtained by heating the photothermographic element or composition containing this combination. This combination can be in a diffusion transfer, photothermographic element.
Inventors
- 👤 Rolf S. Gabrielsen
- 👤 Felice M. Cerquone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:20
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; G03C1/49854
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
68 words
A photothermographic element for producing developed, color images consisting essentially of a support having coated thereon a. photographic silver halide in association with b. a silver salt of a long-chain fatty acid containing 10 to 30 carbon atoms, c. a phenolic leuco dye reducing agent for said silver salt of a long-chain fatty acid, and d. a synthetic polymeric binder, said leuco dye reducing agent being oxidizable imagewise.
Claim 2
Dependent Claim
68 words
A photothermographic element for producing developed, color images consisting essentially of a support having coated thereon a. photographic silver halide in association with b. a silver salt of a long-chain fatty acid containing 10 to 30 carbon atoms, c. a phenolic leuco dye reducing agent for said silver salt of a long-chain fatty acid, and d. a synthetic polymeric binder, said leuco dye reducing agent being oxidizable imagewise.
Claim 3
Dependent Claim
202 words
A photothermographic element as in claim 1 wherein said phenolic leuco dye reducing agent is a compound represented by the formula: ##SPC4## wherein R 1 is halo, alkyl containing 1 to 7 carbon atoms, an aliphatic carbocyclic group containing 5 to 10 carbon atoms, alkoxy containing 1 to 5 carbon atoms, and amide represented by the formula: ##STR5## wherein R 4 and R 5 are individually hydrogen, alkyl containing 1 to 10 carbon atoms, or aryl containing 6 to 12 carbon atoms, R 2 is halo, alkyl containing 1 to 7 carbon atoms, an aliphatic carbocyclic group containing 5 to 10 carbon atoms, alkoxy containing 1 to 5 carbon atoms, alkoxycarbonyl containing 2 to 6 carbon atoms and amide represented by the formula: ##STR6## wherein R 6 and R 7 are individually hydrogen, alkyl containing 1 to 10 carbon atoms, aryl containing 6 to 12 carbon atoms; or R 2 with R 3 consists of atoms necessary to complete a naphthalenic ring, R 3 is hydrogen or with R 2 consists of atoms necessary to complete a naphthalenic ring, and Q is a group which enables the phenolic dye reducing agent to be oxidizable to a quinone methide dye or azomethine dye.
Claim 4
Dependent Claim
16 words
A photothermographic element as in claim 1 wherein said phenolic leuco dye reducing agent is 2-(3,5-di-tert-butyl-4-hydroxyphenyl)-4,5-diphenylimidazole.
Claim 5
Dependent Claim
16 words
A photothermographic element as in claim 1 wherein said phenolic leuco dye reducing agent is 2-(4-hydroxy-3,5-dimethoxy)-4,5-bis(p-methoxyphenyl)imidazole.
Claim 6
Dependent Claim
16 words
A photothermographic element as in claim 1 wherein said phenolic leuco dye reducing agent is bis-(3,5-di-tert-butyl-4-hydroxyphenyl)phenylmethane.
Claim 7
Dependent Claim
12 words
A photothermographic element as in claim 1 also comprising a development modifier.
Claim 8
Dependent Claim
63 words
A photothermographic element consisting essentially of a support having coated thereon a. photographic silver halide in association with b. silver behenate, c. a phenolic reducing agent for said silver behenate, d. a development modifier comprising phthalazinone, succinimide, or N-hydroxy-1,8-naphthalimide, e. a poly(vinyl butyral) binder, and f. a phenolic leuco dye reducing agent for said silver behenate, said dye reducing agent being oxidizable imagewise.
Claim 9
Dependent Claim
63 words
A photothermographic element consisting essentially of a support having coated thereon a. photographic silver halide in association with b. silver behenate, c. a phenolic reducing agent for said silver behenate, d. a development modifier comprising phthalazinone, succinimide, or N-hydroxy-1,8-naphthalimide, e. a poly(vinyl butyral) binder, and f. a phenolic leuco dye reducing agent for said silver behenate, said dye reducing agent being oxidizable imagewise.
Claim 10
Dependent Claim
50 words
A photothermographic composition consisting essentially of a. photographic silver halide in association with b. a silver salt of a long-chain fatty acid containing 10 to 30 carbon atoms, c. a phenolic leuco dye reducing agent for said silver salt of a long-chain fatty acid, and d. a synthetic, polymeric binder.
Claim 11
Dependent Claim
50 words
A photothermographic composition consisting essentially of a. photographic silver halide in association with b. a silver salt of a long-chain fatty acid containing 10 to 30 carbon atoms, c. a phenolic leuco dye reducing agent for said silver salt of a long-chain fatty acid, and d. a synthetic, polymeric binder.
Claim 12
Dependent Claim
22 words
A photothermographic composition comprising a. photographic silver halide in association with b. silver behenate, c. 2-(3,5-di-tert-butyl-4-hydroxyphenyl)-4,5-diphenylimidazole, and d. a poly(vinyl butyral) binder.
Claim 13
Dependent Claim
22 words
A photothermographic composition comprising a. photographic silver halide in association with b. silver behenate, c. 2-(3,5-di-tert-butyl-4-hydroxyphenyl)-4,5-diphenylimidazole, and d. a poly(vinyl butyral) binder.
Claim 14
Dependent Claim
22 words
A photothermographic composition comprising a. photographic silver halide in association with b. silver behenate, c. 2-(4-hydroxy-3,5-dimethoxy)-4,5-bis(p-methoxyphenyl)imidazole, and d. a poly(vinyl buryral) binder.
Claim 15
Dependent Claim
22 words
A photothermographic composition comprising a. photographic silver halide in association with b. silver behenate, c. 2-(4-hydroxy-3,5-dimethoxy)-4,5-bis(p-methoxyphenyl)imidazole, and d. a poly(vinyl buryral) binder.
Claim 16
Dependent Claim
22 words
A photothermographic composition comprising a. photographic silver halide in association with b. silver behenate, c. bis-(3,5-di-tert-butyl-4-hydroxyphenyl)phenylmethane, and d. a poly(vinyl butyral) binder.
Claim 17
Dependent Claim
22 words
A photothermographic composition comprising a. photographic silver halide in association with b. silver behenate, c. bis-(3,5-di-tert-butyl-4-hydroxyphenyl)phenylmethane, and d. a poly(vinyl butyral) binder.
Claim 18
Dependent Claim
12 words
A photothermographic composition as in claim 8 also comprising a development modifier.
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) | 1979-10-12 | 1980-04-12 | 1980-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-10-12 | 1984-04-12 | 1984-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-10-12 | 1988-04-12 | 1988-10-12 | $7700.00 | Window Closed / Lapsed |