US4617256A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Color photographic color coupler-containing recording material
Assignee: Agfa Gevaert AG
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Filing: 1985-11-04
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Granted: 1986-10-14
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Expires: 2005-11-04
Abstract
Abstract Yellow Couplers of the formula ##STR1## wherein Y represents an aliphatic or cycloaliphatic radical; X represents hydrogen or a separable group; R 1 represents an alkyl radical having from 12 to 20 carbon atoms; and R 2 represents an alkyl radical having from 1 to 4 carbon atoms, can be well dissolved in oil formers and also couple in the absence of benzyl alcohol with a high color yield. They are stable against heat and moisture and give rise to stable yellow dyes in color development.
Inventors
- 👤 Friedrich-Wilhelm Kunitz
- 👤 Karl-Wilhelm Schranz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:33
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C7/30511; G03C7/30517; G03C7/30535
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
A colour photographic recording material with at least one photosensitive silver halide emulsion layer and a non-diffusing α-acylacetanilide yellow coupler associated therewith the anilide group of which is substituted by an N-acylsulphamoyl group, characterised in that the yellow coupler corresponds to the following formula: ##STR6## wherein: Y represents an aliphatic or cycloaliphatic radical; X represents a hydrogen atom or a group which can be split off during colour coupling; R 1 represents an alkyl radical having from 12 to 20 carbon atoms; and R 2 represents an alkyl radical having from 1 to 4 carbon atoms.
Claim 2
Dependent Claim
96 words
A colour photographic recording material with at least one photosensitive silver halide emulsion layer and a non-diffusing α-acylacetanilide yellow coupler associated therewith the anilide group of which is substituted by an N-acylsulphamoyl group, characterised in that the yellow coupler corresponds to the following formula: ##STR6## wherein: Y represents an aliphatic or cycloaliphatic radical; X represents a hydrogen atom or a group which can be split off during colour coupling; R 1 represents an alkyl radical having from 12 to 20 carbon atoms; and R 2 represents an alkyl radical having from 1 to 4 carbon atoms.
Claim 3
Dependent Claim
14 words
A recording material as claimed in claim 1 wherein Y is a tert.-alkyl radical.
Claim 4
Dependent Claim
35 words
A recording material as claimed in claim 1 wherein the yellow coupler corresponds to the following formula: ##STR7## wherein X' represents a leaving cyclic group bound via an oxygen atom or a ring nitrogen atom.
Claim 5
Dependent Claim
35 words
A recording material as claimed in claim 1 wherein the yellows coupler corresponds to the following formula: ##STR8## wherein X' represents a leaving cyclic group bound via an oxygen atom or a ring nitrogen atom.
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) | 1989-10-13 | 1990-04-14 | 1990-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-13 | 1994-04-14 | 1994-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-13 | 1998-04-14 | 1998-10-14 | $7700.00 | Window Closed / Lapsed |