US3622328A
Expired / Lapsed
US
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Process for producing photographic color images
Assignee: Agfa Gevaert NV
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Filing: 1968-04-04
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Granted: 1971-11-23
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Expires: 1988-04-04
Abstract
Abstract 2-equivalent couplers for forming cyan dye images in color photography of the naphthol type and characterized by a sulfonyl or sulfinyl group in the coupling position are provided. Such couplers have the inherent advantages of 2-equivalent color couplers and, additionally, a high degree of reactivity, little or no tendency to produce stains by nonimagewise coupling and have all of the desirable attributes of prior art cyan-forming couplers.
Inventors
- 👤 Robert J Pollet
- 👤 Raphael K Van Poucke
- 👤 Arthur Henri De Cat
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:14
CPC Classifications
C; C07; C07C; C07C317/00; G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30523; G03C7/32; G03C7/333; G03C7/3335
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
16 words
A process according to claim 1, wherein the said cyan-forming color coupler corresponds to the formula:
Claim 2
Dependent Claim
15 words
A process according to claim 1 in which the R1 group is a phenyl group.
Claim 3
Dependent Claim
17 words
A process according to claim 1, wherein the R1 group is substituted by a color-conferring azo grouping.
Claim 4
Dependent Claim
34 words
A process according to claim 1, wherein the cyan dyestuff formed on color development of the said photographic element by reaction of said color coupler with the oxidized aromatic primary amino-developing agent is diffusible.
Claim 5
Dependent Claim
34 words
A process according to claim 1, wherein the cyan dyestuff formed on color development of the said emulsion layer by reaction of said color coupler with the oxidized aromatic primary amino-developing agent is nondiffusible.
Claim 6
Dependent Claim
16 words
A process according to claim 1 in which the cyan-forming color coupler corresponds to the formula:
Claim 7
Dependent Claim
34 words
A process according to claim 1 wherein said color coupler is present in a light-sensitive silver halide emulsion layer and/or colloid layer in water-permeable relationship with said emulsion layer of the said photographic element.
Claim 8
Dependent Claim
18 words
A process according to claim 1, wherein the said color coupler is present in the said developer composition.
Claim 9
Dependent Claim
56 words
A photographic element comprising at least one light-sensitive silver halide emulsion layer and a cyan-forming color coupler of the naphthol type carrying in the coupling position a sulfonyl or sulfinyl group of the formula: R1-S(O)n-wherein n represents 1 or 2, and R1 stands for an alkyl group, an aralkyl group, an aryl group or a heterocycle.
Claim 10
Dependent Claim
17 words
A photographic element according to claim 10, wherein the said cyan-forming color coupler corresponds to the formula:
Claim 11
Dependent Claim
15 words
A photographic element according to claim 10, wherein the R1 group is a phenyl group.
Claim 12
Dependent Claim
18 words
A photographic element according to claim 10, wherein the R1 group is substituted by a color-conferring azo grouping.
Claim 13
Dependent Claim
17 words
A photographic element according to claim 10, wherein the said cyan-forming color couplers corresponds to the formula:
References Cited (Backward Citations)
US3227554A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-22 | 1975-05-24 | 1975-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-22 | 1979-05-24 | 1979-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-22 | 1983-05-24 | 1983-11-23 | $7700.00 | Window Closed / Lapsed |