US3881938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally developable light-sensitive material with dimercapto substituted tetrazapentalene toners
Assignee: Fujifilm Holdings Corp
•
Filing: 1973-04-26
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Granted: 1975-05-06
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Expires: 1993-04-26
Abstract
Abstract The present invention relates to a thermally developable lightsensitive material comprising: (1) silver salt of benzotriazole; (2) silver halide prepared by reacting an inorganic halide with the silver salt of benzotriazole; (3) a reducing agent; (4) a binder; and (5) a black-toning agent as described in the specification.
Inventors
- 👤 Takao Masuda
- 👤 Kinji Ohkubo
- 👤 Mitsunori Sugiyama
- 👤 Tadao Shishido
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:19
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
67 words
A THERMALLY DEVELOPABLE LIGHT-SENSITIVE MATERIAL COMPRISING A SUPPORT HAVING THEREON A LAYER COMPRISING- (1) SILVER SALT OF BENZOTRIAZOLE; (2) SILVER HALIDE FORMED BY REACTING AN INORGANIC HALIDE WITH SAID SILVER SALT OF BENZOTRIAZOLE: (3) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ASCORBIC ACID, DERIVATIVES THEREOF AND 3-PYRAZOLIDONE DERIVATIVES, AS A REDUCING AGENT; (4) A BINDER; AND (5) ONE OR MORE COMPOUNDS REPRESENTED BY THE GENERAL FORMULA:
Claim 2
Dependent Claim
67 words
A THERMALLY DEVELOPABLE LIGHT-SENSITIVE MATERIAL COMPRISING A SUPPORT HAVING THEREON A LAYER COMPRISING- (1) SILVER SALT OF BENZOTRIAZOLE; (2) SILVER HALIDE FORMED BY REACTING AN INORGANIC HALIDE WITH SAID SILVER SALT OF BENZOTRIAZOLE: (3) A COMPOUND SELECTED FROM THE GROUP CONSISTING OF ASCORBIC ACID, DERIVATIVES THEREOF AND 3-PYRAZOLIDONE DERIVATIVES, AS A REDUCING AGENT; (4) A BINDER; AND (5) ONE OR MORE COMPOUNDS REPRESENTED BY THE GENERAL FORMULA:
Claim 3
Dependent Claim
35 words
A thermally developable light-sensitive element as claimed in claim 1 wherein the compound of the present invention is present in an amount of from 0.001 to 1 mol per mol of silver salt of benzotriazole.
Claim 4
Dependent Claim
29 words
A thermally developable light-sensitive element as claimed in claim 2 wherein the silver salt of benzotriazole is present in an amount of from about 0.3 to about 3 g/m2.
Claim 5
Dependent Claim
56 words
A thermally developable light-sensitive element as claimed in claim 3 where the reducing agent is present in an amount of from 0.1 to 5 mols per mol of the silver salt of benzotriazole and the silver halide is present in an amount of from 1/1000 to 0.5 mol per mol of the silver salt of benzotriazole.
Claim 6
Dependent Claim
31 words
A thermally developable light-sensitive element as claimed in claim 4 where the binder is present in a proportion of 4:1 to 1:4 (weight ratio to parts of silver salt of benzotriazole).
Claim 7
Dependent Claim
28 words
A thermally developable light-sensitive element as claimed in claim 5 where in the compound R1 and R2 is hydrogen, C1 - C4 alkyl, phenyl or halogen substituted phenyl.
Claim 8
Dependent Claim
40 words
A thermally developable light-sensitive element as claimed in claim 6 where the inorganic halide is of the formula MXn where M is hydrogen, ammonium or a metal, X is chloride, bromine or iodine and n is the valence of M.
Claim 9
Dependent Claim
31 words
A thermally developable light-sensitive element as claimed in claim 7 where M is hydrogen, ammonium, mercury, osmium, calcium, tin, gold, manganese, gallium, indium, rhodium, ruthenium, palladium, iridium, platinum, thallium, or bismuth.
Claim 10
Dependent Claim
40 words
A thermally developable light-sensitive element as claimed in claim 7 where the reducing agent is ascorbic acid or the monolaurate, monomyristate, monopalmitate, monostearate, monobehenate, dilurate, dimyristate, dipalmitate, distearate, and dibehenate of ascorbic acid, 1-phenyl-3-pyrazolidone, 1-p-methylphenyl-3-pyrazolidone, 1-phenyl-5-carboxy-3-pyrazolidone, 1-phenyl-4,4-dimethyl-3-pyrazolidone, 1-phenyl-5-carboxyethyl-3-pyrazolidone, and 1-phenyl-5-methyl-3-pyrazolidone.
Claim 11
Dependent Claim
41 words
A thermally developable light-sensitive element as claimed in claim 8 where the reducing agent is ascorbic acid or the monolaurate, monomyristate, monopalmitate, monostearate, monobehenate, dilurate, dimyristate, dipalmitate, distearate, and dibehenate of ascorbic acid, 1-phenyl-3-pyrazolidone, 1-phenyl-4-methyl-3-pyrazolidone, 1-p-methylphenyl-3-pyrazolidone, 1-phenyl-5-carboxy-3-pyrazolidone, 1-phenyl-4,4-dimethyl-3-pyrazolidone, 1-phenyl-5-carboxyethyl-3-pyrazolIdone, and 1-phenyl-5-methyl-3-pyrazolidone.
Claim 12
Dependent Claim
24 words
A thermally developable light-sensitive element as claimed in claim 10 where the compound is selected from Compounds 1-7 below: COMPOUND 1 3,6-Dimercapto-1,4-diphenyl-1H,4H-2,3a,5,6a-tetrazapentalene (m.p.: 188*C)
Claim 13
Dependent Claim
27 words
A thermally developable light-sensitive element as claimed in claim 7 where the silver salt of benzotriazole has a particle size of 0.01 Mu to 5 Mu .
References Cited (Backward Citations)
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US3645739A
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US3589901A
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US3615549A
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US3832186A
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |