US4212937A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat developable photosensitive materials
Assignee: Asahi Kasei Corp
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Filing: 1978-12-14
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Granted: 1980-07-15
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Expires: 1998-12-14
Abstract
Abstract A heat developable photosensitive material comprising: (a) an organic silver salt oxidizing agent; (b) a halogen molecule or an organic haloamide compound; (c) a reducing agent for silver ion; and (d) a nitrogen-containing organic base whose pKa of the conjugate acid ranges from 0.5 to 10.0 and the nitrogen-containing organic base having, in its molecule, no acidic proton or a nitrogen-containing organic base whose pKa of its conjugate acid ranges from 0.5 to 10.0 and the nitrogen-containing organic base having, in its molecule, an acidic proton whose pKa is more than 12.
Inventors
- 👤 Kageyasu Akashi
- 👤 Minoru Akiyama
- 👤 Tetsuo Shiga
- 👤 Takeki Matsui
- 👤 Yoshio Hayashi
- 👤 Takeo Kimura
- 👤 Hidehiko Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
121 words
In a heat developable photosensitive material comprising: (a) an organic silver salt oxidizing agent; (b) a halogen molecule or an organic haloamide compound; and (c) a reducing agent for silver ion; the improvement which comprises incorporating therein (d) at least one nitrogen-containing organic base selected from the group consisting of pyridine, quinoline, isoquinoline, acridine, phenanthridine, pyridazine, pyrimidine, pyrazine, cinnoline, phthalazine, quinazoline, quinoxaline, phenazine, m-, o-, p-phenanthroline, pteridine, pyrazole, imidazole, benzimidazole, 2-chloropyridine, 3-chloropyridine, 2-bromopyridine, 3-bromopyridine, 2-methylpyridine, 3-methylpyridine, 4-methylpyridine, 2,6-diisopropylpyridine, 2-isopropylpyridine, 2-tertbutylpyridine, 3-phenylpyridine, 2,6-di-tert-butylpyridine, 3-acetylpyridine, αα'-dipyridyl, β,β'-dipyridyl, γ,γ'-dipyridyl, 5-nitro-1,10-phenanthroline, 2-methylquinoline, 3-methylquinoline, 4-methylquinoline, 2-chloroquinoline, 4-chloroquinoline, 2-methoxyisoquinoline, 4-methylpyrimidine, 2-dimethylaminopyrimidine, 2-methoxyquinazoline, 2-methylquinoxaline, 1-methylpyrazole and 2-methylpyrazole, in an amount of about 0.001 mole to about 1 mole per mole of the organic silver salt oxidizing agent (a).
Claim 2
Dependent Claim
121 words
In a heat developable photosensitive material comprising: (a) an organic silver salt oxidizing agent; (b) a halogen molecule or an organic haloamide compound; and (c) a reducing agent for silver ion; the improvement which comprises incorporating therein (d) at least one nitrogen-containing organic base selected from the group consisting of pyridine, quinoline, isoquinoline, acridine, phenanthridine, pyridazine, pyrimidine, pyrazine, cinnoline, phthalazine, quinazoline, quinoxaline, phenazine, m-, o-, p-phenanthroline, pteridine, pyrazole, imidazole, benzimidazole, 2-chloropyridine, 3-chloropyridine, 2-bromopyridine, 3-bromopyridine, 2-methylpyridine, 3-methylpyridine, 4-methylpyridine, 2,6-diisopropylpyridine, 2-isopropylpyridine, 2-tertbutylpyridine, 3-phenylpyridine, 2,6-di-tert-butylpyridine, 3-acetylpyridine, αα'-dipyridyl, β,β'-dipyridyl, γ,γ'-dipyridyl, 5-nitro-1,10-phenanthroline, 2-methylquinoline, 3-methylquinoline, 4-methylquinoline, 2-chloroquinoline, 4-chloroquinoline, 2-methoxyisoquinoline, 4-methylpyrimidine, 2-dimethylaminopyrimidine, 2-methoxyquinazoline, 2-methylquinoxaline, 1-methylpyrazole and 2-methylpyrazole, in an amount of about 0.001 mole to about 1 mole per mole of the organic silver salt oxidizing agent (a).
Claim 3
Dependent Claim
36 words
The heat developable photosensitive material of claim 1, wherein the halogen molecule is at least one compound sleected from the group consisting of molecular iodine, molecular bromine, iodine monochloride, iodine trichloride, iodine bromide and bromine chloride.
Claim 4
Dependent Claim
15 words
The heat developable photosensitive material of claim 1, wherein the halogen molecule is molecular iodine.
Claim 5
Dependent Claim
55 words
The heat developable photosensitive material of claim 1, wherein the organic haloamide compound is at least one compound selected from the group consisting of N-chlorosuccinimide, N-bromosuccinimide, N-iodosuccinimide, N-chlorophthalimide, N-bromophthalimide, N-iodophthalimide, N-chlorophthalazinone, N-bromophthalazinone, N-iodophthalazinone, N-chloroacetamide, N-bromoacetamide, N-iodoacetamide, N-chloroacetanilide, N-bromoacetanilide, N-iodoacetanilide, 1-chloro-3,5,5-trimethyl-2,4-imidazolidinedione, 1-bromo-3,5,5-trimethyl-2,4-imidazolidinedione, 1-iodo-3,5,5-trimethyl-2,4-imidazolidinedione, 1,3-di-chloro-5,5-dimethyl-2,4-imidazolidinedione, 1,3-dibromo-5,5-dimethyl-2,4-imidazolidinedione, 1,3-diiodo-5,5-dimethylimidazolidinedione, N,N-dichlorobenzenesulfonamide, N,N-dibromobenzenesulfonamide, N-bromo-N-methylbenzenesulfonamide, N-chloro-N-methylbenzenesulfonamide, N,N-diiodobenzenesulfonamide, N-iodo-N-methylbenzenesulfonamide, 1,3-dichloro-4,4-dimethylhydantoin, 1,3-dibromo-4,4-dimethylhydantoin and 1,3-diiodo-4,4-dimethylhydantoin.
Claim 6
Dependent Claim
40 words
The heat developable photosensitive material of claim 1, wherein the amount of the halogen molecule or the organic halomide compound (b) ranges from about 0.001 mole to about 0.5 mole per mole of the organic silver salt oxidizing agent (a).
Claim 7
Dependent Claim
33 words
The heat developable photosensitive material of claim 1, wherein the organic silver salt oxidizing agent (a) is a silver salt of a long chain aliphatic carboxylic acid having 12 to 24 carbon atoms.
Claim 8
Dependent Claim
19 words
The heat developable photosensitive material of claim 6, wherein the organic silver salt oxidizing agent (a) is silver behenate.
Claim 9
Dependent Claim
40 words
The heat developable photosensitive material of claim 1, wherein the amount of the organic silver salt oxidizing agent (a) ranges from about 0.1 g/m 2 to about 50 g/m 2 of the support area of the heat developable photosensitive material.
Claim 10
Dependent Claim
44 words
The heat developable photosensitive material of claim 1, wherein the amount of the reducing agent for silver ion (c) ranges from about 0.1 percent by weight to about 200 percent by weight based on the weight of the organic silver salt oxidizing agent (a).
Claim 11
Dependent Claim
19 words
The heat developable photosensitive material of claim 1, wherein the reducing agent for silver ion (c) is 2,2-methylenebis (4-ethyl-6-tert-butylphenol).
Claim 12
Dependent Claim
14 words
The heat developable photosensitive material of claim 1, wherein (b) is an organic iodoamide.
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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) | 1983-07-15 | 1984-01-14 | 1984-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-07-15 | 1988-01-14 | 1988-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-07-15 | 1992-01-14 | 1992-07-15 | $7700.00 | Window Closed / Lapsed |