US4499180A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat-developable color photographic materials with base precursor
Assignee: Fujifilm Holdings Corp
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Filing: 1984-02-27
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Granted: 1985-02-12
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Expires: 2004-02-27
Abstract
Abstract A heat-developable color photographic material is disclosed. The material is comprised of a support base, a binder, a light-sensitive silver halide, a dye releasing redox compound which reduces the light-sensitive silver halide and releases a hydrophilic dye by reacting with the light-sensitive silver halide by heating; and a base precursor. The base precursor is represented by the general formula: <IMAGE> wherein the substituents are defined within the specification. The material is capable of forming dye images with high density by heating the material after exposure in a substantially water free state. The images can be obtained in a short period of time and maintain their color density during storage. Further, the material produces a relatively low degree of fog based on the high degree of image density obtained.
Inventors
- 👤 Hiroyuki Hirai
- 👤 Ken Kawata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:30
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/24; C07D213/44; C07D213/53; C07D239/00; C07D239/02; C07D239/06; C07D295/00; C07D295/16; C07D295/20; C07D295/205; G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; G03C8/00; G03C8/40; G03C8/4013; G03C8/408; G03C8/4086; Y; Y10; Y10S; Y10S430/00; Y10S430/156
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
146 words
A heat-developable color photographic material, comprising: a support base having thereon: a binder having dispersed therein; a light-sensitive silver halide; a dye releasing redox compound which reduces the light-sensitive silver halide and releases a hydrophilic dye by reacting with the light-sensitive silver halide by heating; and a base precursor represented by the following general formula: ##STR37## wherein A 1 represents a substituent selected from an alkyl group, a substituted alkyl group, a cycloalkyl group, an alkenyl group, and aralkyl group, an aryl group, a substitued aryl group, an acyl group and a heterocyclic group, A 2 and A 3 represent each a substituent selected from a hydrogen atom, an alkyl group, a substituted alkyl group, a cycloalkyl group, and an aralkyl group, and A 2 and A 3 may form a ring by linking together or ##STR38## may form an imino group by a double bond.
Claim 2
Dependent Claim
146 words
A heat-developable color photographic material, comprising: a support base having thereon: a binder having dispersed therein; a light-sensitive silver halide; a dye releasing redox compound which reduces the light-sensitive silver halide and releases a hydrophilic dye by reacting with the light-sensitive silver halide by heating; and a base precursor represented by the following general formula: ##STR37## wherein A 1 represents a substituent selected from an alkyl group, a substituted alkyl group, a cycloalkyl group, an alkenyl group, and aralkyl group, an aryl group, a substitued aryl group, an acyl group and a heterocyclic group, A 2 and A 3 represent each a substituent selected from a hydrogen atom, an alkyl group, a substituted alkyl group, a cycloalkyl group, and an aralkyl group, and A 2 and A 3 may form a ring by linking together or ##STR38## may form an imino group by a double bond.
Claim 3
Dependent Claim
22 words
A heat-developable color photographic material as claimed in claim 1, wherein A 1 represents an aryl group or a substituted aryl group.
Claim 4
Dependent Claim
25 words
A heat-developable color photographic material as claimed in claim 1, wherein A 2 and A 3 represent an alkyl group or a substituted alkyl group.
Claim 5
Dependent Claim
36 words
A heat-developable color photographic material as claimed in claim 1, wherein the base precursor is present in the layer in an amount of 50% by weight or less based on the total weight of the layer.
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) | 1988-02-12 | 1988-08-13 | 1989-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-12 | 1992-08-13 | 1993-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-12 | 1996-08-13 | 1997-02-12 | $7700.00 | Window Closed / Lapsed |