US4414309A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Photographic recording material containing an aldehyde remover
Assignee: Agfa Gevaert AG
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Filing: 1982-11-24
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Granted: 1983-11-08
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Expires: 2002-11-24
Abstract
Abstract Compounds corresponding to the following general formula ##STR1## wherein R 1 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, a heterocyclic group or one of the following groups: --CO--alkyl, --CO--aryl, --CO--heterocyclic group, --SO 2 --alkyl, --SO 2 --aryl, --CO--O--alkyl, --CO--NH--NH 2 , ##STR2## and R 2 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, alkoxy, aroxy, carboxyl, carbamoyl, alkoxycarbonyl, an alkyl or aryl group attached through a carbonyl group, cyanogen, an amino group optionally substituted by alkyl, aralkyl, aryl or acyl, or a cyclic amino group may be used as additives in the layers of color photographic recording materials to improve the stability of color couplers, in particular magenta couplers, against formaldehyde.
Inventors
- 👤 Hans Langen
- 👤 Lothar Rosenhahn
- 👤 Erich Wolff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:25
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/392; G03C7/39208; G03C7/3924; G03C7/39244; G03C7/39252
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
139 words
Colour photographic recording material containing at least one silver halide emulsion layer and a colour coupler associated therewith, containing an aldehyde scavenger in at least one light-sensitive or light-insensitive layer of binder, characterised in that the aldehyde scavenger contained in the material is a compound corresponding to the following general formula: ##STR18## wherein R 1 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, a heterocyclic group or one of the following groups: --CO--alkyl, --CO--aryl, --CO--heterocyclic, --SO 2 --alkyl, --SO 2 --aryl, --CO--O--alkyl, --CO--NH--NH 2 , ##STR19## and R 2 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, alkoxy, aroxy, carboxyl, carbamoyl, alkoxycarbonyl, an alkyl or aryl group attached through a carbonyl group, cyano, an amino group optionally substituted by alkyl, aralkyl, aryl or acyl, or a cyclic amino group.
Claim 2
Dependent Claim
139 words
Colour photographic recording material containing at least one silver halide emulsion layer and a colour coupler associated therewith, containing an aldehyde scavenger in at least one light-sensitive or light-insensitive layer of binder, characterised in that the aldehyde scavenger contained in the material is a compound corresponding to the following general formula: ##STR18## wherein R 1 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, a heterocyclic group or one of the following groups: --CO--alkyl, --CO--aryl, --CO--heterocyclic, --SO 2 --alkyl, --SO 2 --aryl, --CO--O--alkyl, --CO--NH--NH 2 , ##STR19## and R 2 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, alkoxy, aroxy, carboxyl, carbamoyl, alkoxycarbonyl, an alkyl or aryl group attached through a carbonyl group, cyano, an amino group optionally substituted by alkyl, aralkyl, aryl or acyl, or a cyclic amino group.
Claim 3
Dependent Claim
33 words
Recording material according to claim 1, characterised in that the aldehyde scavenger is contained in one or more layers of binder in a (total) quantity of from 10 to 2000 mg/m 2 .
Claim 4
Dependent Claim
17 words
Recording material according to claim 1, characterised by containing a magenta coupler derived from 3-acylaminopyrazolone or 3-anilinopyrazolone.
Claim 5
Dependent Claim
17 words
Recording material according to claim 1, characterised in that at least one layer contains gelatine as binder.
Claim 6
Dependent Claim
18 words
Recording material according to claim 4, characterised in that the gelatine was hardened with a N-carbamoyl pyridinium compound.
References Cited (Backward Citations)
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US3168400A
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US3511663A
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US3652278A
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UST900028I4
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-11-07 | 1987-05-09 | 1987-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-11-07 | 1991-05-09 | 1991-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-11-07 | 1995-05-09 | 1995-11-08 | $7700.00 | Window Closed / Lapsed |