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US4738919A Expired / Lapsed US ⏱️ 0.0 years remaining

Photosensitive photographic silver halide recording material

Assignee: Agfa Gevaert AG
•
Filing: 1986-12-11
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Granted: 1988-04-19
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Expires: 2006-12-11
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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.

References Cited (Backward Citations)

US900028A Cited
UST900028I4 Cited
US4388404A Cited
US4435503A Cited
US4411987A Cited
US4414309A Cited
EP0087984A2 Cited
US4490460A Cited
US4614707A Cited

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

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