US3660095A
Expired / Lapsed
US
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Photographic silver halide color material utilizing benzoylacetamide color couplers
Assignee: Agfa Gevaert NV
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Filing: 1969-06-27
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Granted: 1972-05-02
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Expires: 1989-06-27
Abstract
Abstract Photographic materials are described comprising a lightsensitive silver halide emulsion layer and a benzoylacetamide color coupler capable of forming a yellow azomethine dye by reaction with an oxidized aromatic primary amino developing agent in which the benzoyl part of the color coupler contains at least one substituent of the formula : RCF2Qwherein : R is hydrogen, fluorine or polyhaloalkyl, and Q is oxygen, sulphur or sulphonyl. These color couplers in light-sensitive silver halide emulsions provide photographic materials having improved light stability.
Inventors
- 👤 Marcel Hendrik Verbrugghe
- 👤 Arthur Henri De Cat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:50
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/32; G03C7/36; G03C7/362
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
94 words
A photographic material according to claim 1, wherein said color coupler is fast to diffusion in photographic colloid layers by the presence in the amide part of its molecule of a group, which is directly linked to the group A or through a substituent thereof, rendering the molecule fast to diffusion and corresponding to the formula -Y-D wherein D stands for an acyclic aliphatic hydrocarbon residue with from 5 to 20 carbon atoms and Y stands for a chemical bond, oxygen, sulphur, sulphonyl, -N(alkyl)-, -CONH-, -NHCO-, -N(R3)SO2- and -SO2N(R3)- wherein R3 H or alkyl.
Claim 2
Dependent Claim
21 words
A photographic material according to claim 2, wherein A stands for a phenyl nucleus, a thiazolyl nucleus or a pyridyl nucleus.
Claim 3
Dependent Claim
130 words
A photographic material according to claim 2, wherein A stands for the group corresponding to the formula : wherein : Y stands for a chemical bond, oxygen, sulphur, sulphonyl, -N(alkyl)-, -CONH-, -NHCO-, -N(R3)SO2- and -SO2N(R3)- wherein R3 H or alkyl, D stands for an acyclic aliphatic hydrocarbon residue with from 5 to 20 carbon atoms, Z2 stands for hydrogen, an alkyl group, an aryl group, a halogen atom, a sulpho or carboxyl group in acid or salt form, a fluorosulphonyl group, an alkoxycarbonyl group, a sulphamoyl group, an alkylsulphonyl group, an alkoxy group, an alkylthio group, an aryloxy group, an arylthio group or the group wherein each of R4 and R5 stands for alkyl, aryl or aralkyl or together represent the atoms necessary to form a morpholine or piperidine nucleus.
Claim 4
Dependent Claim
38 words
Photographic multilayer color material comprising in one of the light-sensitive silver halide emulsion layers or in a non-light-sensitive water-permeable colloid layer in water-permeable relationship with the light-sensitive silver halide emulsion layer a color coupler according to claim 1.
Claim 5
Dependent Claim
40 words
Photographic multilayer color material according to claim 5, comprising three silver halide emulsion layers which are differently optically sensitized, wherein the blue-sensitive silver halide emulsion layer or a non-light-sensitive colloid layer in water-permeable relationship therewith incorporates the said color coupler.
Claim 6
Dependent Claim
62 words
Process for the production of a photographic color image by development of a photographic element containing image-wise exposed silver halide with the aid of an aromatic primary amino developing agent, which by reduction of the exposed silver halide is converted into its oxidized form and as such forms a yellow azomethine dye by reaction with a color coupler according to claim 1.
Claim 7
Dependent Claim
31 words
Process according to claim 7, wherein said color coupler is present in a blue-sensitive silver halide emulsion layer or other colloid layer in water-permeable relationship therewith of the said photographic element.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |