US3801330A
Expired / Lapsed
US
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Photographic silver halide recording material
Assignee: Agfa Gevaert NV
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Filing: 1971-12-20
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Granted: 1974-04-02
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Expires: 1991-12-20
Abstract
Abstract A photosensitive heat-developable element comprising a silver halide emulsion, a developing agent and a post-exposure stabilizing agent. The post-exposure stabilizing agent can be for example, 3-allylimidazolin-2-thione. After exposure, an image can be developed and stabilized in one step by heating to a temperature within the range of about 80*-200*C.
Inventors
- 👤 R Ceulemans
- 👤 E Brinckman
- 👤 F Heugebaert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:23
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/34; G03C1/346; C; C07; C07D; C07D233/00; C07D233/04; C07D233/28; C07D233/30; C07D233/42; G03C1/43
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
18 words
A photosensitive material according to claim 1, wherein the silver halide is dispersed in gelatin as binding agent.
Claim 2
Dependent Claim
24 words
A photosensitive material according to claim 1, wherein as developing agent a pyrazolidin-3-one developing agent is used, which corresponds to the following general formula:
Claim 3
Dependent Claim
22 words
A photosensitive material according to claim 1, wherein the silver halide is used in combination with a compound liberating water on heating.
Claim 4
Dependent Claim
19 words
A photosensitive material according to claim 1, wherein the silver halide is used in combination with a hygroscopic compound.
Claim 5
Dependent Claim
21 words
A photosensitive material according to claim 1, wherein the silver halide is used in combination with a polymer containing oxyalkylene groups.
Claim 6
Dependent Claim
18 words
A photosensitive material according to claim 1, wherein the silver halide is used in combination with a polyol.
Claim 7
Dependent Claim
44 words
A photosensitive material according to claim 1, wherein an alkaline compound is present in an adjacent layer to said recording layer from which it can penetrate into the recording layer so that during development the pH of the recording layer is raised above 7.
Claim 8
Dependent Claim
38 words
A photosensitive material according to claim 8, wherein said alkaline compound is sodium formate, sodium acetate, ammonium acetate, sodium benzoate, tetramethylguanidine, aminoguanidine hydrogen carbonate, trichloroacetic acid guanidine salt, 4-amino-2,6-dimethyl-pyrimidine, or an addition complex compound of diethylamine and 2,2-bis(4-hydroxy-2,3,5,6-tetrachlorophenyl)-propane.
Claim 9
Dependent Claim
25 words
A photosensitive material according to claim 3, wherein the pyrazolidin-3-one developing agent is used in conjunction with a minor amount of an auxiliary developing agent.
Claim 10
Dependent Claim
14 words
A photosensitive material according to claim 10, wherein 2-hydrazino-benzothiazole is said auxiliary developing agent.
Claim 11
Dependent Claim
20 words
A photosensitive material according to claim 1, wherein the stabilizing agent is present in the layer containing the silver halide.
Claim 12
Dependent Claim
23 words
A photosensitive material according to claim 1, wherein the stabilizing agent is present in a layer adjacent to the silver halide containing layer.
Claim 13
Dependent Claim
67 words
A process for the production of silver images, which comprises information-wise exposing to electromagnetic radiation a photosensitive recording material comprising a support bearing at least one recording layer containing photosensitive silver halide, a reducing agent for heat-developing exposed silver halide and including in effective contact with the silver halide during heat-development, a post-exposure stabilizing agent corresponding to the following general formula or the tautomeric thiol form thereof:
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |