Patent US4738919A successfully refreshed from Google Patents.
US4738919A
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Photosensitive photographic silver halide recording material
Assignee: Agfa Gevaert AG
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Filing: 1986-12-11
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Granted: 1988-04-19
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Expires: 2006-12-11
Abstract
Abstract A photographic recording material containing at least one pyrazolone in at least one non-photosensitive layer I, a compound Sc, which reacts with the oxidation product of a p-phenylene diamine developer to form substantially colorless products and which is contained in a non-photosensitive layer which is not separated from the layer I by a photosensitive silver halide emulsion layer, shows improved protection against formaldehyde.
Inventors
- 👤 Gerd Krauss
- 👤 Gunter Renner
- 👤 Erich Wolff
- 👤 Hans Langen
- 👤 Werner Krafft
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; G03C7/3003; G03C7/3005; G03C7/3008; G03C7/3012
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
308 words
A photographic recording material comprising a support, at least one photosensitive silver halide emulsion layer, at least one color coupler associated therewith, at least one pyrazolone of the formula ##STR15## in which R 1 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, a heterocycle or one of the following groups: --CO-alkyl, --CO-aryl, --CO-heterocycle, --SO 2 -alkyl, SO 2 -aryl, --CO--O-alkyl, --CO--NH--NH 2 , ##STR16## 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 by a carbonyl group, cyano, an amino group optionally substituted by alkyl, aralkyl, aryl or acyl or a cyclic amino group in at least one non-photosensitive layer (I) which is arranged further from the support than the uppermost photosensitive layer, and at least a scavenger of the formula ##STR17## in which R 5 is an optionally substituted alkyl or aryl group, R 6 is an optionally substituted alkyl or aryl group or ##STR18## R 7 is an optionally substituted alkyl, aryl or acyl group, R 8 and R 9 may be the same or different and represent hydrogen or an optionally substituted alkyl, aryl or acyl group or of the formula ##STR19## in which R 10 and R 12 may be the same or different and represent hydrogen, alkyl, aryl or --CO--R 15 , R 11 , R 13 and R 14 may be the same or different and represent hydrogen or alkyl and R 15 represents alkyl, aralkyl, alkoxy, aryloxy or alkylamino, and in which R 13 and R 14 or R 13 and R 12 together may represent the members required to complete a ring, which said scavenger being contained in at least one nonphotosensitive layer which is not separated from the layer I by a photosensitive silver halide emulsion layer.
Claim 2
Dependent Claim
308 words
A photographic recording material comprising a support, at least one photosensitive silver halide emulsion layer, at least one color coupler associated therewith, at least one pyrazolone of the formula ##STR15## in which R 1 represents hydrogen, an aliphatic or cycloaliphatic group, an aralkyl group, an aryl group, a heterocycle or one of the following groups: --CO-alkyl, --CO-aryl, --CO-heterocycle, --SO 2 -alkyl, SO 2 -aryl, --CO--O-alkyl, --CO--NH--NH 2 , ##STR16## 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 by a carbonyl group, cyano, an amino group optionally substituted by alkyl, aralkyl, aryl or acyl or a cyclic amino group in at least one non-photosensitive layer (I) which is arranged further from the support than the uppermost photosensitive layer, and at least a scavenger of the formula ##STR17## in which R 5 is an optionally substituted alkyl or aryl group, R 6 is an optionally substituted alkyl or aryl group or ##STR18## R 7 is an optionally substituted alkyl, aryl or acyl group, R 8 and R 9 may be the same or different and represent hydrogen or an optionally substituted alkyl, aryl or acyl group or of the formula ##STR19## in which R 10 and R 12 may be the same or different and represent hydrogen, alkyl, aryl or --CO--R 15 , R 11 , R 13 and R 14 may be the same or different and represent hydrogen or alkyl and R 15 represents alkyl, aralkyl, alkoxy, aryloxy or alkylamino, and in which R 13 and R 14 or R 13 and R 12 together may represent the members required to complete a ring, which said scavenger being contained in at least one nonphotosensitive layer which is not separated from the layer I by a photosensitive silver halide emulsion layer.
Claim 3
Dependent Claim
31 words
A photographic recording material as claimed in claim 1, wherein the scavenger is arranged in a layer which is arranged between the layer containing the pyrazolone and the uppermost photosensitive layer.
Claim 4
Dependent Claim
20 words
A photographic recording material as claimed in claim 1, wherein the scavenger is arranged in the layer containing the pyrazolone.
Claim 5
Dependent Claim
22 words
A color photographic recording material as claimed in claim 1, wherein the pyrazolone and the compound Sc are incorporated in non-diffusing form.
Claim 6
Dependent Claim
19 words
A color photographic recording material as claimed in claim 1, wherein an iminopyrazoline is additionally incorporated in any layer.
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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) | 1991-04-19 | 1991-10-19 | 1992-04-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-04-19 | 1995-10-19 | 1996-04-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-04-19 | 1999-10-19 | 2000-04-19 | $7700.00 | Window Closed / Lapsed |