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US4028108A
Expired / Lapsed
US
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Free-radical photographic material
Assignee: Agfa Gevaert NV
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Filing: 1975-11-10
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Granted: 1977-06-07
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Expires: 1995-11-10
Abstract
Abstract A photographic process in which a photographic material containing in a layer on a support a mixture of the following compounds: 1. at least one ultraviolet-sensitive organic polyhalogen compound capable of producing a dye salt with a spiropyran compound on exposure with ultraviolet radiation, 2. at least one spirobi(arylpyran) compound, 3. N-vinylcarbazole, 4. at least one compound selected from the group consisting of furan, furylacrylic acid and 2-carboxyfuran, 5. at least one compound selected from the group consisting of 1-phenyl-3-pyrazolidinone, benzalphenylhydrazone and 1,5-dimethyl-2-phenyl-4-pyrazolin-3-one, and 6. a polymeric compound containing N-vinylcarbazole units, Is image-wise exposed to ultraviolet radiation of an intensity sufficient to produce a print-out image and the exposed material is heated to stabilize the image and to increase its spectral density in the three primary color spectral regions.
Inventors
- 👤 Freddy Ghisleen Van Royen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:36
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/675; G03C1/685; Y; Y10; Y10S; Y10S430/00; Y10S430/163
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
86 words
A photographic material containing in a layer on a support a mixture of the following compounds: 1. at least one ultraviolet-sensitive organic polyhalogen compound capable of producing a dye salt with a spiropyran compound on exposure with ultraviolet radiation, 2. at least one spirobi(arylpyran) compound, 3. N-vinylcarbazole, 4. at least one compound selected from the group consisting of furan, furylacrylic acid and 2-carboxyfuran, 5. at least one compound selected from the group consisting of 1-phenyl-3-pyrazolidinone, benzalphenylhydrazone and 1,5-dimethyl-2-phenyl-4-pyrazolin-3-one, and 6. a polymeric compound containing N-vinylcarbazole units.
Claim 2
Dependent Claim
86 words
A photographic material containing in a layer on a support a mixture of the following compounds: 1. at least one ultraviolet-sensitive organic polyhalogen compound capable of producing a dye salt with a spiropyran compound on exposure with ultraviolet radiation, 2. at least one spirobi(arylpyran) compound, 3. N-vinylcarbazole, 4. at least one compound selected from the group consisting of furan, furylacrylic acid and 2-carboxyfuran, 5. at least one compound selected from the group consisting of 1-phenyl-3-pyrazolidinone, benzalphenylhydrazone and 1,5-dimethyl-2-phenyl-4-pyrazolin-3-one, and 6. a polymeric compound containing N-vinylcarbazole units.
Claim 3
Dependent Claim
16 words
A photographic material according to claim 1, containing as organic polyhalogen compound carbon tetrabromide and/or iodoform.
Claim 4
Dependent Claim
16 words
A photographic material according to claim 1, wherein the layer contains as sole binding agent poly-N-vinylcarbazole.
Claim 5
Dependent Claim
13 words
A photographic material according to claim 1, wherein the spirobi(arylpyran) compound is 3-methyl-di-β-naphthospiropyran.
Claim 6
Dependent Claim
15 words
A photographic material according to claim 1, wherein the layer contains triphenylstibine as an anti-foggant.
Claim 7
Dependent Claim
28 words
A photographic material according to claim 1, wherein the spiropyran is present in admixture with a photo-sensitive C 1 -polyhaloalkane in a weight ratio of 1:1 to 1:20.
Claim 8
Dependent Claim
26 words
A photographic material according to claim 1, wherein N-vinylcarbazole is present in a weight ratio of 1:3 to 1:10 with respect to the photosensitive polyhalogen compound.
Claim 9
Dependent Claim
30 words
A photographic material according to claim 1, wherein furan, 2-carboxyfuran for furylacrylic acid is present in a weight ratio of 1:3 to 1:10 with respect to the photosensitive polyhalogen compound.
Claim 10
Dependent Claim
29 words
A photographic material according to claim 1, wherein 1-phenyl-3-pyrazolidinone, benzylphenylhydrazone or 1,5-dimethyl-2-phenyl-4-pyrazolin-3-one is present in a weight ratio of 1:3 to 1:10 with respect to the photosensitive polyhalogen compound.
Claim 11
Dependent Claim
129 words
A photographic process in which a photographic material containing in a layer on a support a mixture of the following compounds: 1. at least one ultraviolet-sensitive organic polyhalogen compound capable of producing a dye salt with a spiropyran compound on exposure with ultraviolet radiation, 2. at least one spirobi(arylpyran) compound, 3. N-vinylcarbazole, 4. at least one compound selected from the group consisting of furan, furylacrylic acid and 2-carboxyfuran, 5. at least one compound selected from the group consisting of 1-phenyl-3-pyrazolidinone, benzalphenylhdrazone and 1,5-dimethyl-2-phenyl-4-pyrazolin-3-one, and 6. a polymeric compound containing N-vinylcarbazole units, is image-wise exposed to ultraviolet radiation of an intensity sufficient to produce a print-out image and the exposed material is heated to stabilize the image and to increase its spectral density in the three primary colour spectral regions.
Claim 12
Dependent Claim
129 words
A photographic process in which a photographic material containing in a layer on a support a mixture of the following compounds: 1. at least one ultraviolet-sensitive organic polyhalogen compound capable of producing a dye salt with a spiropyran compound on exposure with ultraviolet radiation, 2. at least one spirobi(arylpyran) compound, 3. N-vinylcarbazole, 4. at least one compound selected from the group consisting of furan, furylacrylic acid and 2-carboxyfuran, 5. at least one compound selected from the group consisting of 1-phenyl-3-pyrazolidinone, benzalphenylhdrazone and 1,5-dimethyl-2-phenyl-4-pyrazolin-3-one, and 6. a polymeric compound containing N-vinylcarbazole units, is image-wise exposed to ultraviolet radiation of an intensity sufficient to produce a print-out image and the exposed material is heated to stabilize the image and to increase its spectral density in the three primary colour spectral regions.
Claim 13
Dependent Claim
18 words
A photographic process according to claim 10, wherein heating proceeds in the range of 100° to 200° C.
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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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |