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US4144068A Expired / Lapsed US ⏱️ 0.0 years remaining

Method for color photographic processing

Assignee: Fujifilm Holdings Corp
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Filing: 1978-01-30
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Granted: 1979-03-13
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Expires: 1998-01-30
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Abstract

Abstract In a method of processing an image-wise exposed silver halide color photographic material by applying thereto at least a color development processing and a silver removal processing (including performing a bleaching and a fixing separately or simultaneously, (e.g., a blixing)), the improvement which comprises processing, after the color development processing, the silver halide color photographic material with a processing bath containing a compound, as a bleach accelerator, represented by the following general formula (I): ##STR1## wherein R represents an --NR 4 R 5 group, an --O--R 6 group or an --S--R 6 group; R 6 represents an atomic group necessary for forming a ring together with R 1 ; R 1 , R 4 and R 5 , which may be the same or different, each represents a hydrogen atom or an alkyl group; R 2 and R 3 , which may be the same or different, each represents a hydrogen atom or a methyl group; n represents 1 or 2; X represents an amino group, a hydroxyl group, a --COO(M) m group or an --SO 3 (M) m group; M represents a cation rendering the compound water soluble; and m represents 0 or 1 and is 0 when the compound forms an inner salt; the nitrogen atom bound to R 1 may be quaternized with the charge of the quaternized nitrogen atom being neutralized by an acid group and R 1 may form a ring together with R 4 or R 5 ; with the processing bath being used prior to or as a bleach bath or a blix bath, each containing a ferric ion complex as a bleaching agent.

Inventors

  • 👤 Hiroshi Ishibashi
  • 👤 Nobuo Sakai
  • 👤 Kiyoshi Imai
  • 👤 Junya Nakajima

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 18:59
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/42; G03C7/421

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 258 words
In a method of processing an image-wise exposed silver halide color photographic material by applying thereto a color development processing and a silver removal processing, the improvement which comprises, after the color development processing, processing the silver halide color photographic material with a processing bath containing a compound represented by the following general formula (I) as a bleach accelerator: ##STR6## wherein R represents an --NR 4 R 5 group, an --O--R 6 group or an --S--R 6 group; R 6 represents an atomic group necessary for forming a ring together with R 1 ; R 1 , R 4 and R 5 , which may be the same or different, each represents a hydrogen atom or an alkyl group; R 2 and R 3 , which may be the same or different, each represents a hydrogen atom or a methyl group; n represents 0, 1 or 2; X represents an amino group, a hydroxyl group, a --COO(M) m group or an --SO 3 (M) m group; M represents a cation rendering the compound water soluble; and m represents 0 or 1 and is 0 when the compound forms an inner salt; wherein the nitrogen atom bound to R 1 may be quaternized with the charge of the quaternized nitrogen atom being neutralized by an acid group and R 1 may form a ring together with R 4 or R 5 , wherein the processing bath is used as a bleach bath or a blix bath, each containing a ferric ion complex as a bleaching agent, or prior thereto.
Claim 2
Dependent Claim 258 words
In a method of processing an image-wise exposed silver halide color photographic material by applying thereto a color development processing and a silver removal processing, the improvement which comprises, after the color development processing, processing the silver halide color photographic material with a processing bath containing a compound represented by the following general formula (I) as a bleach accelerator: ##STR6## wherein R represents an --NR 4 R 5 group, an --O--R 6 group or an --S--R 6 group; R 6 represents an atomic group necessary for forming a ring together with R 1 ; R 1 , R 4 and R 5 , which may be the same or different, each represents a hydrogen atom or an alkyl group; R 2 and R 3 , which may be the same or different, each represents a hydrogen atom or a methyl group; n represents 0, 1 or 2; X represents an amino group, a hydroxyl group, a --COO(M) m group or an --SO 3 (M) m group; M represents a cation rendering the compound water soluble; and m represents 0 or 1 and is 0 when the compound forms an inner salt; wherein the nitrogen atom bound to R 1 may be quaternized with the charge of the quaternized nitrogen atom being neutralized by an acid group and R 1 may form a ring together with R 4 or R 5 , wherein the processing bath is used as a bleach bath or a blix bath, each containing a ferric ion complex as a bleaching agent, or prior thereto.
Claim 3
Dependent Claim 40 words
The color photographic processing method as claimed in claim 1, wherein said processing bath containing the bleach accelerator is a bleach bath, a blix bath or another bath used after the color development and prior to the silver removal processing.
Claim 4
Dependent Claim 25 words
The color photographic processing method as claimed in claim 1, wherein said ferric ion complex comprises a complex with an aminopolycarboxylic acid as a ligand.
Claim 5
Dependent Claim 21 words
The color photographic processing method as claimed in claim 1, wherein said color photographic method is a reversal color photographic method.
Claim 6
Dependent Claim 43 words
The color photographic processing method as claimed in claim 1, wherein the silver halide color photographic material comprises a support having thereon at least one silver halide photographic emulsion layer and at least one silver halide emulsion layer comprises a silver iodobromide emulsion.
Claim 7
Dependent Claim 35 words
The color photographic processing method as claimed in claim 1, wherein the amount of said bleach accelerator in the processing bath ranges from about 2 × 10 -6 to about 1 × 10 -1 mol/liter.
Claim 8
Dependent Claim 29 words
The color photographic processing method as claimed in claim 6, wherein the amount of said bleach accelerator ranges from 1 × 10 -4 to 5 × 10 -2 mol/liter.
Claim 9
Dependent Claim 16 words
The color photographic processing method as claimed in claim 1, wherein said bleach accelerator is ##STR7##
Claim 10
Dependent Claim 95 words
The color photographic processing method as claimed in claim 1, wherein said bleach accelerator is a compound represented by the general formula (II): ##STR8## wherein R 2 , R 3 , and n each have the same significance as in the general formula (I), wherein the number of carbon atoms of the --(CHR 2 ) n (CHR 3 )-- moiety is 3 or less; X represents a hydroxyl group, a --COO(M) m group or an --SO 3 (M) m group; and M and m each have the same significance as in the general formula (I).

References Cited (Backward Citations)

US2981624A Cited
US3042521A Cited
US2952539A Cited
US3220839A Cited
US3879202A Cited
US3767401A Cited
US3940271A Cited
US3964905A Cited
US4075021A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1982-03-12 1982-09-11 1983-03-13 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1986-03-12 1986-09-11 1987-03-13 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1990-03-12 1990-09-11 1991-03-13 $7700.00 Window Closed / Lapsed

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