US4639414A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat developable light-sensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1985-06-13
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Granted: 1987-01-27
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Expires: 2005-06-13
Abstract
Abstract A heat developable light-sensitive material comprising a support having thereon (1) a light-sensitive silver halide emulsion, (2) at least one of a base and a base precursor, and (3) a binder, wherein the silver halide emulsion is one which is chemically sensitized in the presence of a sensitizing dye. With the heat developable light-sensitive material, decrease in sensitivity and formation of fog during preservation thereof are prevented.
Inventors
- 👤 Yukihiko Sakaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 00:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49818
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
71 words
A heat developable light-sensitive material comprising a support having thereon (1) a light-sensitive hydrophilic colloid silver halide emulsion, (2) at least one of a base and a base precursor, and (3) a hydrophilic binder, wherein the light-sensitive hyrophilic colloid silver halide emulsion is one which is chemically sensitized in the presence of a spectral sensitizing dye added after the formation of the silver halide grains but before completion of chemical sensitization.
Claim 2
Dependent Claim
71 words
A heat developable light-sensitive material comprising a support having thereon (1) a light-sensitive hydrophilic colloid silver halide emulsion, (2) at least one of a base and a base precursor, and (3) a hydrophilic binder, wherein the light-sensitive hyrophilic colloid silver halide emulsion is one which is chemically sensitized in the presence of a spectral sensitizing dye added after the formation of the silver halide grains but before completion of chemical sensitization.
Claim 3
Dependent Claim
71 words
A heat developable light-sensitive material as claimed in claim 1, wherein the light-sensitive hydrophilic colloid silver halide emulsion is chemically sensitized by a sulfur sensitization method using active gelatin or a compound containing sulfur capable of reacting with silver, a sensitization method using a compound containing selenium or tellurium, a reduction sensitization method using a reducing material, a noble metal sensitization method using a noble metal compound or a combination thereof.
Claim 4
Dependent Claim
19 words
A heat developable light-sensitive material as claimed in claim 1, wherein the spectral sensitizing dye is a methine dye.
Claim 5
Dependent Claim
43 words
A heat developable light-sensitive material as claimed in claim 3, wherein the methine dye is a cyanine dye, a merocyanine dye, a complex cyanine dye, a complex merocyanine dye, a holopolar cyanine dye, a hemicyanine dye, a styryl dye or a hemioxonol dye.
Claim 6
Dependent Claim
26 words
A heat developable light-sensitive material as claimed in claim 3, wherein the methine dye is a cyanine dye, a merocyanine dye or a complex merocyanine dye.
Claim 7
Dependent Claim
84 words
A heat developable light-sensitive material as claimed in claim 4, wherein the cyanine dye has, as a basic heterocyclic nucleus, a pyrroline nucleus, an oxazoline nucleus, a thiazoline nucleus, a pyrrole nucleus, an oxazole nucleus, a thiazole nucleus, a selenazole nucleus, an imidazole nucleus, a tetrazole nucleus or a pyridine nucleus, a nucleus formed by fusing together one of the above-described nuclei and an alicyclic hydrocarbon ring; or a nucleus formed by fusing together one of the above-described nuclei and an aromatic hydrocarbon ring.
Claim 8
Dependent Claim
46 words
A heat developable light-sensitive material as claimed in claim 6, wherein the fused nucleus is an indolenine nucleus, a benzindolenine nucleus, an indole nucleus, a benzoxazole nucleus, a naphthoxazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, a benzoselenazole nucleus, a benzimidazole nucleus or a quinoline nucleus.
Claim 9
Dependent Claim
26 words
A heat developable light-sensitive material as claimed in claim 4, wherein the merocyanine dye or the complex merocyanine dye contains a 5-membered or 6-membered heterocyclic nucleus.
Claim 10
Dependent Claim
38 words
A heat developable light-sensitive material as claimed in claim 8, wherein the 5-membered or 6-membered heterocyclic nucleus is a pyrazolin-5-one nucleus, a thiohydantoin nucleus, a 2-thioxazolidine-2,4-dione nucleus, a thiazolidine-2,4-dione nucleus, a rhodanine nucleus or a thiobarbituric acid nucleus.
Claim 11
Dependent Claim
37 words
A heat developable light-sensitive material as claimed in claim 1, wherein an amount of the sensitizing dye is from 0.001 to 20 g per 100 g of silver to be used for making a silver halide emulsion.
Claim 12
Dependent Claim
37 words
A heat developable light-sensitive material as claimed in claim 10, wherein the amount of the sensitizing dye is from 0.01 to 2 g per 100 g of silver to be used for making a silver halide emulsion.
Claim 13
Dependent Claim
37 words
A heat developable light-sensitive material as claimed in claim 1, wherein a concentration of the sensitizing dye in a reaction solution used at the chemical sensitization process of a silver halide emulsion is 1 wt% or less.
Claim 14
Dependent Claim
22 words
A heat developable light-sensitive material as claimed in claim 12, wherein the concentration of the sensitizing dye is 0.1 wt% or less.
Claim 15
Dependent Claim
20 words
A heat developable light-sensitive material as claimed in claim 1, wherein the light-sensitive material further contains an organic silver salt.
Claim 16
Dependent Claim
52 words
A heat developable light-sensitive material as claimed in claim 14, wherein the organic silver salt is a silver salt of an organic compound having a carboxyl group, a silver salt of a compound having a mercapto group or a thione group, or a silver salt of a compound having an imino group.
Claim 17
Dependent Claim
42 words
A heat developable light-sensitive material as claimed in claim 15, wherein the organic silver salt is a silver salt of an aliphatic carboxylic acid, a silver salt of an aromatic carboxylic acid, or a silver salt of benzotriazole or a derivative thereof.
Claim 18
Dependent Claim
20 words
A heat developable light-sensitive material as claimed in claim 1, wherein the light-sensitive material further contains an image forming substance.
Claim 19
Dependent Claim
18 words
A heat developable light-sensitive material as claimed in claim 17, wherein the image forming substance is a coupler.
Claim 20
Dependent Claim
20 words
A heat developable light-sensitive material as claimed in claim 17, wherein the image forming substance is a dye providing substance.
Claim 21
Dependent Claim
20 words
A heat developable light-sensitive material as claimed in claim 1, wherein the light-sensitive material further contains an auxiliary developing agent.
Claim 22
Dependent Claim
32 words
A heat developable light-sensitive material as claimed in claim 20, wherein an amount of the auxiliary developing agent is from 0.0005 to 20 times by mol based on the amount of silver.
Claim 23
Dependent Claim
20 words
A heat developable light-sensitive material as claimed in claim 1, wherein the light-sensitive material further contains a dye transfer assistant.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-26 | 1990-07-28 | 1991-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-26 | 1994-07-28 | 1995-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-26 | 1998-07-28 | 1999-01-27 | $7700.00 | Window Closed / Lapsed |