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US3922170A Expired / Lapsed US ⏱️ 0.0 years remaining

Spectrally sensitized silver halide photographic emulsion

Assignee: Fujifilm Holdings Corp
•
Filing: 1973-07-20
•
Granted: 1975-11-25
•
Expires: 1993-07-20
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Abstract

Abstract A silver halide photographic emulsion which is spectrally sensitized so that it has a maximum sensitivity wave length within the region of 580 nm - 640 nm, characterized by containing in a super sensitizing amount the combination of at least one carbocyanine dye represented by the general formula (I) and at least one of the dyes selected from the group consisting of dyes represented by the general formula (II) and (III): WHEREIN Z1 represents the grouping necessary for the formation of Beta -naphthothiazole or Beta -naphthoselenazole ring, Z2 represents the grouping necessary for the formation of benzoxazole ring, A1 represents a hydrogen atom, an alkyl radical or an aryl radical, R1 and R2 each represents an alkyl radical, at least one of which represents a hydroxyalkyl radical, a carboxyalkyl radical or alkyl radical having a sulfo group, X1 represents an acid anion group, and l is 1, or 2 the dye forming an intramolecular salt when l is 1: WHEREIN Z3 and Z4 each represents the grouping necessary for the formation of a benzothiazole, benzoselenazole, Beta naphthothiazole or Beta -naphthoselenazole ring, A2 represents a hydrogen atom, an alkyl radical having less than three carbon atoms or an aryl radical, R3 and R4 each represents an alkyl radical, at least one of which represents a hydroxyalkyl radical, a carboxyalkyl radical or an alkyl radical having a sulfo group, X2 represents an acid anion group, and m is 1 or 2, the dye forming an intramolecular salt when m is 1. WHEREIN Z5 represents the grouping necessary for the formation of a benzoxazole orbenzimidazole ring, Z6 represents the grouping necessary for the formation of a benzothiazole, benzoselenazole or Beta -naphthothiazole ring, A3 represents a hydrogen atom, an alkyl radical having less than three carbon atoms or an aryl radical, R5 and R6 each represents an alkyl radical, at least one of which represents a hydroxyalkyl radical, a carboxyalkyl radical or an alkyl radical having a sulfo group, X3 represents an acid anion group, and n is 1, the dye forming an intramolecular salt when n is 1.

Inventors

  • 👤 Keisuke Shiba
  • 👤 Akira Sato

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 13:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29; C; C09; C09B; C09B23/00; C09B23/02; C09B23/06; C09B23/12

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 56 words
A SILVER HALIDE PHOTOGRAPHIC EMULSION WHICH IS SPECTRALLY SENSITIZED SO THAT IT HAS A MAXIMUM SENSITIVITY WAVE LENGTH WITHIN THE REGION OF 580 NM - 64O NM, CHARACTERIZED BY CONTAINING IN A SUSPERSENSITIZING AMOUNT THE COMBINATION OF: AT LEAST ONECARBOCYANINE DYE REPRESENTED BY GENERAL FORMULA (I) AND AT LEAST ONE DYE REPRESENT BY GENERAL FORMULA (III):
Claim 2
Dependent Claim 56 words
A SILVER HALIDE PHOTOGRAPHIC EMULSION WHICH IS SPECTRALLY SENSITIZED SO THAT IT HAS A MAXIMUM SENSITIVITY WAVE LENGTH WITHIN THE REGION OF 580 NM - 64O NM, CHARACTERIZED BY CONTAINING IN A SUSPERSENSITIZING AMOUNT THE COMBINATION OF: AT LEAST ONECARBOCYANINE DYE REPRESENTED BY GENERAL FORMULA (I) AND AT LEAST ONE DYE REPRESENT BY GENERAL FORMULA (III):
Claim 3
Dependent Claim 69 words
The silver halide photographic emulsion of claim 1, wherein the hetero ring formed by Z2, Z5 and Z6 is substituted with at least one substituent, said substituent being selected from the group consisting of an alkyl group, a halogen atom, a monoaryl group, an alkoxy group, a hydroxy group, an alkoxy carbonyl group, a cyano group, an amino group, an aminocarbonyl group, a monoaryloxy group and an acyl group.
Claim 4
Dependent Claim 122 words
The silver halide photographic emulsion of claim 1, wherein Z2 is a benzoxazole, 5-methyl benzoxazole, 5,6-dimethyl benzoxazole, 5-chlorobenzoxazole, 5-chloro-6-methyl benzoxazole, 5-bromobenzoxazole, 5-phenyl benzoxazole, 5-tolyl benzoxazole, 5-methoxy benzoxazole, 5-hydroxy benzoxazole, 5-methoxycarbonyl benzoxazole, 5-ethoxycarbonyl benzoxazole, 5-trifluoromethyl benzoxazole, 5-cyanobenzoxazole, 5-aminobenzoxazole, 5-phenoxybenzoxazole, or 5-acetyl benzoxazole ring; wherein A1, and A3 each is a hydrogen atom, a methyl, ethyl, propyl, phenethyl or phenyl radical; wherein R1, R2, R5 and R6 each is a methyl, ethyl, propyl, allyl, 2-carboxyethyl, 4-carboxybutyl, 3-carboxypropyl, 2-methoxyethyl, 3-sulfopropyl, 3-sulfobutyl,2-(3-sulfopropoxy)ethyl, 2-hydroxy-3-sulfopropyl, 3-sulfopropoxyethoxyethyl, 2-bromoethyl, or p-sulfophenethyl; Z5 is a ring as described for Z2, or 5-chlorobenzimidazole, 5,6-dichlorobenzimidazole, 5-trifluoromethylbenzimidazole, 5-methoxycarbonyl benzimidazole or 5-cyano-6-chlorobenzimidazole ring; and X1, and X3 each represents an iodine, bromine, chlorine, p-toluene sulfonic acid, benzene sulfonic acid, ethyl sulfate, perchlorate, or rhodan ions.
Claim 5
Dependent Claim 17 words
The silver halide photographic emulsion of claim 1, wherein said dye of the general formula (I) is
Claim 6
Dependent Claim 74 words
The silver halide photographic emulsion of claim 1, wherein said dyes of the general formula (I), and (III) are present at a level of from about 5 X 10 3 to 1 X 10 6 mol of dye per mol of silver and wherein the molar ratio of the amount of dye of the general formula (II) and (III) to the amount of dye of the general formula (I) is about 1:100 to 1:1.
Claim 7
Dependent Claim 46 words
The silver halide photographic emulsion of claim 1, wherein Z1 is a Beta -naphthothiazole ring, Z2 is a benzoxazole ring which is suBstituted at the 5-position with a chlorine atom, a trifluoromethyl group, a methyl group or a phenyl group and A1 is an ethyl group.
Claim 8
Dependent Claim 45 words
The silver halide photographic emulsion of claim 1, wherein A3 is a hydrogen atom, a methyl group, or an ethyl group, R5 and R6 each is a methyl group, an ethyl group, a propyl group, an allyl group, a carboxyalkyl group, or a sulfoalkyl group.
Claim 9
Dependent Claim 19 words
The silver halide photographic emulsion of claim 1, wherein said emulsion additionally contains phenol or naphol series cyan coupler.
Claim 10
Dependent Claim 17 words
A silver halide photographic material comprising a support having thereon the silver halide emulsion of claim 1.

References Cited (Backward Citations)

US3177210A Cited
US3338714A Cited
US3463640A Cited
US3615609A Cited
US3711288A Cited
US3679428A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-11-24 1979-05-26 1979-11-25 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-11-24 1983-05-26 1983-11-25 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-11-24 1987-05-26 1987-11-25 $7700.00 Window Closed / Lapsed

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