Patent US4237215A successfully refreshed from Google Patents.
US4237215A
Expired / Lapsed
US
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Heat-developable light-sensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1978-04-20
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Granted: 1980-12-02
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Expires: 1998-04-20
Abstract
Abstract A heat-developable light-sensitive material comprising on a support at least one layer containing (a) an organic silver salt; (b) a light-sensitive silver halide; (c) a reducing agent; and (d) a binder; wherein the light-sensitive silver halide component (b) comprises the reaction product obtained by decomposing an N-halo compound in the presence of the organic silver salt (a) for reaction with the organic silver salt (a) before applying the layer on the support and an embodiment includes a heat-developable light-sensitive material in which the N-halo compound is decomposed in the presence of an alcohol to form the light-sensitive silver halide component (b).
Inventors
- 👤 Shinpei Ikenoue
- 👤 Takao Masuda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:00
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49818; Y; Y10; Y10S; Y10S430/00; Y10S430/136
Claims Analysis
Total Claims: 34
Claim 1
Independent Claim
92 words
In a method of preparing a heat developable light-sensitive material comprising on a support at least one layer containing (a) an organic silver salt; (b) a light-sensitive silver halide; (c) a reducing agent; and (d) a binder; the improvement which comprises increasing the sensitivity of and improving the gradation of said light-sensitive material by decomposing a N-halo compound in the presence of the organic silver salt (a) and an alcohol for reaction with the organic silver salt (a) to produce the light-sensitive silver halide (b) before applying the layer on the support.
Claim 2
Dependent Claim
92 words
In a method of preparing a heat developable light-sensitive material comprising on a support at least one layer containing (a) an organic silver salt; (b) a light-sensitive silver halide; (c) a reducing agent; and (d) a binder; the improvement which comprises increasing the sensitivity of and improving the gradation of said light-sensitive material by decomposing a N-halo compound in the presence of the organic silver salt (a) and an alcohol for reaction with the organic silver salt (a) to produce the light-sensitive silver halide (b) before applying the layer on the support.
Claim 3
Dependent Claim
32 words
The method of claim 1, wherein the organic silver salt is a silver salt of an organic compound containing a carboxyl group, a hydroxyl group, and imino group or a mercapto group.
Claim 4
Dependent Claim
22 words
The method of claim 1, wherein said N-halo compound comprises the combination of N-iodosuccinimide and one of N-bromosuccinimide, N-bromophthalimide, 1-bromo-3,5,5'-trimethyl-2,4-imidazolidinedione, or 1,3-dibromo-5,5-dimethyl-2,4-imidazolidinedione.
Claim 5
Dependent Claim
42 words
The method of claim 1, wherein the N-halo compound is at least one compound represented by General Formula (I) ##STR11## wherein X represents a halogen atom and Z represents an atomic group necessary for forming a 5-membered ring or a 6-membered ring.
Claim 6
Dependent Claim
11 words
The method of claim 4, wherein said N-halo compound is N-bromophthalazone.
Claim 7
Dependent Claim
66 words
The method of claim 1, wherein the N-halo compound is at least one compound represented by the General Formula (II) ##STR12## wherein R 1 represents an alkyl group, an aryl group or an alkoxy group, R 2 represents a hydrogen atom, an alkyl group, an aryl group or an alkoxy group, A represents a carbonyl group or a sulfonyl group, and X represents a halogen atom.
Claim 8
Dependent Claim
11 words
The method of claim 6, wherein said N-halo compound is N-bromosuccinimide.
Claim 9
Dependent Claim
11 words
The method of claim 6, wherein said N-halo compound is N-bromophthalimide.
Claim 10
Dependent Claim
11 words
The method of claim 6, wherein said N-halo compound is N-bromoacetamide.
Claim 11
Dependent Claim
15 words
The method of claim 1, wherein the N-halo compound is at least one halogenated melamine.
Claim 12
Dependent Claim
11 words
The method of claim 10, wherein said N-halo compound is 1-bromo-3,5,6'-trimethyl-2,4-imidazolidinedione.
Claim 13
Dependent Claim
11 words
The method of claim 10, wherein said N-halo compound is 1,3-dibromo-5,5-dimethyl-2,4-imidazolidinedione.
Claim 14
Dependent Claim
26 words
The method of claim 1, wherein the N-halo compound is decomposed until a merocyanine dye in the presence of the N-halo compound is no longer decolored.
Claim 15
Dependent Claim
16 words
The method of claim 1, wherein the alcohol is a primary alcohol or a secondary alcohol.
Claim 16
Dependent Claim
15 words
The method of claim 14, wherein the alcohol is a liquid at about 30° C.
Claim 17
Dependent Claim
46 words
The method of claim 15, wherein the alcohol is an aliphatic alcohol having 1 to 8 carbon atoms, an alicyclic alcohol having 5 to 10 carbon atoms, an aromatic alcohol having 7 to 12 carbon atoms or a heterocyclic alcohol having 5 to 10 carbon atoms.
Claim 18
Dependent Claim
22 words
The method of claim 1, wherein the N-halo compound is decomposed at a temperature of about 0° C. to about 80° C.
Claim 19
Dependent Claim
20 words
The method of claim 17, wherein the N-halo compound is decomposed at a temperature of 30° C. to 65° C.
Claim 20
Dependent Claim
20 words
The method of claim 17, wherein the N-halo compound is decomposed at a temperature of 40° C. to 55° C.
Claim 21
Dependent Claim
34 words
The method of claim 19, wherein the N-halo compound is heated and decomposed at 40° C. to 55° C. for 30 minutes to 3 hours in the presence of the organic silver salt (a).
Claim 22
Dependent Claim
27 words
The method of claim 1, wherein the N-halo compound is present in a proportion of about 0.1 to 30 mol % based on the total silver quantity.
Claim 23
Dependent Claim
26 words
The method of claim 21, wherein said N-halo compound is present in an amount of 0.5 to 20 mol % based on the total silver quantity.
Claim 24
Dependent Claim
13 words
The method of claim 1, wherein the N-halo compound is an N-bromo compound.
Claim 25
Dependent Claim
22 words
The method of claim 1, wherein said N-halo compound comprises at least about 30 mol % or more of an N-bromo compound.
Claim 26
Dependent Claim
24 words
The method of claim 24, including an N-iodo compound an N-chloro compound or a mixture thereof in an amount less than 50 mol %.
Claim 27
Dependent Claim
34 words
The method of claim 24, wherein said N-bromo compound is present in an amount of more than 40 mol % and including an N-chloro compound in an amount of less than 60 mole %.
Claim 28
Dependent Claim
34 words
The method of claim 24, wherein said N-bromo compound is present in an amount of more than 50 mol % and including an N-iodo compound in an amount of less than 50 mol %.
Claim 29
Dependent Claim
17 words
The method of claim 24, wherein said N-halo compound comprises an N-bromo compound and an N-iodo compound.
Claim 30
Dependent Claim
11 words
The method of claim 1, further containing a color toning agent.
Claim 31
Dependent Claim
12 words
The method of claim 29, wherein the color toning agent is phthalazinone.
Claim 32
Dependent Claim
10 words
The method of claim 1, further containing a sensitizing dye.
Claim 33
Dependent Claim
25 words
The method of claim 1, wherein the organic silver salt is a silver salt of an aliphatic carboxylic acid having 10 or more carbon atoms.
Claim 34
Dependent Claim
19 words
The method of claim 1, wherein said N-halo compound is N-iodosuccinimide and one of N-bromosuccinimide, N-bromophthalimide, N-bromoacetamide, or N-bromophthalazone.
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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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |