US4526853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of providing an increased brightening effect and silver halide photographic material having increased brightening effect
Assignee: Konica Minolta Inc
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Filing: 1983-10-14
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Granted: 1985-07-02
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Expires: 2003-10-14
Abstract
Abstract A silver halide color photographic material having improved whiteness and a method of processing said material are disclosed. The material is formed on a hydrophobic support at least one silver halide emulsion layer, a layer containing a brightening agent and a layer containing a compound that is capable of trapping the brightening agent, said layer containing a compound capable of trapping the brightening agent being separate from the layer containing the brightening agent and positioned more remote from the support than the latter layer, and also, the method for providing enhanced brightening effect comprises subjecting said material to imagewise exposure and color development so that said brightening agent is diffused into and trapped by the layer containing capable of trapping the brightening agent.
Inventors
- 👤 Toyoki Nishijima
- 👤 Masao Sasaki
- 👤 Kaoru Onodera
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 18:02
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/396; Y; Y10; Y10S; Y10S430/00; Y10S430/134
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
143 words
A silver halide color photographic material having formed on a hydrophobic support at least one silver halide emulsion layer, a layer containing a brightening agent, a layer containing a compound that is capable of trapping the brightening agent, and at least one layer containing a UV absorber, said layer containing a compound capable of trapping the brightening agent being separate from the layer containing the brightening agent and positioned more remote from the support than the layer containing the brightening agent, the UV absorber layer being positioned more remote from the support than the silver halide emulsion layers and the layer containing the brightening agent, the compound capable of trapping the brightening agent being incorporated in at least one of the UV absorber containing layers or a layer that is more remote from the support than the most remote UV absorber containing layer.
Claim 2
Dependent Claim
143 words
A silver halide color photographic material having formed on a hydrophobic support at least one silver halide emulsion layer, a layer containing a brightening agent, a layer containing a compound that is capable of trapping the brightening agent, and at least one layer containing a UV absorber, said layer containing a compound capable of trapping the brightening agent being separate from the layer containing the brightening agent and positioned more remote from the support than the layer containing the brightening agent, the UV absorber layer being positioned more remote from the support than the silver halide emulsion layers and the layer containing the brightening agent, the compound capable of trapping the brightening agent being incorporated in at least one of the UV absorber containing layers or a layer that is more remote from the support than the most remote UV absorber containing layer.
Claim 3
Dependent Claim
27 words
A silver halide color photographic material according to claim 1, wherein said brightening agent is selected from a group consisting of diaminostilbene, benzidine, imidazole and imidazolone compounds.
Claim 4
Dependent Claim
23 words
A silver halide color photographic material according to claim 1, wherein said compound capable of trapping the brightening agent is a hydrophilic polymer.
Claim 5
Dependent Claim
24 words
A silver halide color photographic material according to claim 3, wherein said hydrophilic polymer is polyvinylpyrrolidone or polymer having vinylpyrrolidone as a repeating unit.
Claim 6
Dependent Claim
24 words
A silver halide color photographic material according to claim 3, wherein said hydrophilic polymer have a weight average molecular weight of 1,000 or greater.
Claim 7
Dependent Claim
64 words
A silver halide color photographic material according to claim 1, wherein said UV absorber is a benzotriazole compound represented by the following formula V: ##STR14## wherein R 1 , R 2 and R 3 are each a hydrogen atom, a halogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an alkenyl group, a nitro group and a hydroxyl group.
Claim 8
Dependent Claim
32 words
A silver halide color photographic material according to claim 1, wherein said layer containing a brightening agent is deposited in an amount of 0.1 to 0.5 mg/dm 2 of a brightening agent.
Claim 9
Dependent Claim
16 words
A silver halide color photographic material according to claim 1, which further includes a protective layer.
Claim 10
Dependent Claim
37 words
A silver halide color photographic material according to claim 8, said layer containing a compound capable of trapping the brightening agent is positioned between the emulsion layer positioned the remotest from the support and the protective layer.
Claim 11
Dependent Claim
16 words
A silver halide color photographic material according to claim 1, which further includes a non-emulsion layer.
Claim 12
Dependent Claim
40 words
A silver halide color photographic material according to claim 10, wherein said layer containing a brightening agent is the non-emulsion layer that is positioned closer to the support than the UV absorber containing layer positioned the remotest from the support.
Claim 13
Dependent Claim
17 words
A silver halide color photographic material according to claim 1, wherein said support is a reflective support.
Claim 14
Independent Claim
174 words
A method for providing enhanced brightening effect which comprises subjecting a novel silver halide color photographic material to imagewise exposure and color development so that said brightening agent is diffused into and trapped by the layer containing a compound capable of trapping the brightening agent, said silver halide color photographic material having formed on a hydrophobic support at least one silver halide emulsion layer, a layer containing a brightening agent, at least one layer containing a UV absorber, and a layer containing a compound that traps the brightening agent being separate from the layer containing the brightening agent and positioned more remote from the support than the layer containing the brightening agent, the UV absorber layer being positioned more remote from the support than the silver halide emulsion layers and the layer containing the brightening agent, the compound capable of trapping the brightening agent being incorporated in at least one of the UV absorber containing layers or a layer that is more remote from the support than the most remote UV absorber containing layer.
Claim 15
Independent Claim
174 words
A method for providing enhanced brightening effect which comprises subjecting a novel silver halide color photographic material to imagewise exposure and color development so that said brightening agent is diffused into and trapped by the layer containing a compound capable of trapping the brightening agent, said silver halide color photographic material having formed on a hydrophobic support at least one silver halide emulsion layer, a layer containing a brightening agent, at least one layer containing a UV absorber, and a layer containing a compound that traps the brightening agent being separate from the layer containing the brightening agent and positioned more remote from the support than the layer containing the brightening agent, the UV absorber layer being positioned more remote from the support than the silver halide emulsion layers and the layer containing the brightening agent, the compound capable of trapping the brightening agent being incorporated in at least one of the UV absorber containing layers or a layer that is more remote from the support than the most remote UV absorber containing 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) | 1988-07-01 | 1988-12-31 | 1989-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-01 | 1992-12-31 | 1993-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-01 | 1996-12-31 | 1997-07-02 | $7700.00 | Window Closed / Lapsed |