Patent US4656125A successfully refreshed from Google Patents.
US4656125A
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Photographic recording material
Assignee: Agfa Gevaert AG
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Filing: 1985-09-16
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Granted: 1987-04-07
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Expires: 2005-09-16
Abstract
Abstract Compounds having a structure corresponding to the following formula. ##STR1## wherein G represents OH or a precursor group which is unstable to alkali, X represents a substituent which cannot be split off, Y represents --O--alkyl, --SO 2 --NR 1 --R 2 , --CO--NR 1 --R 2 , --NR 1 --CO--R 3 , or --NR 1 --SO 2 --R 3 , R 1 represents H or alkyl, R 2 represents alkyl, aralkyl or aryl, R 3 represents alkoxy, aroxy, alkylamino, arylamino or R 2 , Z represents H, alkyl, alkoxy, halogen or acylamino and n represents 1 or 2 are suitable for improving the stability to light of image dyes produced from photographic couplers, in particular yellow couplers.
Inventors
- 👤 Gunter Renner
- 👤 Werner Liebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:11
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/39212; G03C7/39216
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A color photographic recording material comprising at least one silver halide emulsion layer and a color coupler associated therewith, comprising, in a silver halide emulsion layer or in a light insensitive layer of binder adjacent thereto, a combination of a yellow coupler and a compound corresponding to the general formula I: ##STR12## wherein G represents a hydroxyl group or an alkali labile precursor group of a hydroxyl group, X represents an alkyl, alkoxy carbonyl, carbamoyl, sulphamoyl, alkyl sulfonyl or aryl sulphonyl group which is a substituent which is not split off under the conditions of chromogenic development, Y represents a group corresponding to one of the following formula: O-alkyl, SO 2 -NR 1 -R 2 , CO-NR 1 -R 2 , NR 1 -CO-R 3 , or NR 1 -SO 2 -R 3 R 1 =hydrogen or alkyl, R 2 =alkyl, aralkyl or aryl, and R 3 =alkoxy, aroxy, alkylamino, arylamino or a group as indicated for R 2 ; Z represents hydrogen, alkyl, halogen or acylamino; and n represents 1 or 2.
Claim 2
Dependent Claim
173 words
A color photographic recording material comprising at least one silver halide emulsion layer and a color coupler associated therewith, comprising, in a silver halide emulsion layer or in a light insensitive layer of binder adjacent thereto, a combination of a yellow coupler and a compound corresponding to the general formula I: ##STR12## wherein G represents a hydroxyl group or an alkali labile precursor group of a hydroxyl group, X represents an alkyl, alkoxy carbonyl, carbamoyl, sulphamoyl, alkyl sulfonyl or aryl sulphonyl group which is a substituent which is not split off under the conditions of chromogenic development, Y represents a group corresponding to one of the following formula: O-alkyl, SO 2 -NR 1 -R 2 , CO-NR 1 -R 2 , NR 1 -CO-R 3 , or NR 1 -SO 2 -R 3 R 1 =hydrogen or alkyl, R 2 =alkyl, aralkyl or aryl, and R 3 =alkoxy, aroxy, alkylamino, arylamino or a group as indicated for R 2 ; Z represents hydrogen, alkyl, halogen or acylamino; and n represents 1 or 2.
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) | 1990-04-06 | 1990-10-06 | 1991-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-04-06 | 1994-10-06 | 1995-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-04-06 | 1998-10-06 | 1999-04-07 | $7700.00 | Window Closed / Lapsed |