US3977882A
Expired / Lapsed
US
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Spectrally sensitized silver halide photographic emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1975-07-17
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Granted: 1976-08-31
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Expires: 1995-07-17
Abstract
Abstract A silver halide photographic emulsion which is spectrally sensitized so that it has a maximum sensitivity wave length within the region of 580-640 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): ##EQU1## WHEREIN Z 1 represents the grouping necessary for the formation of β-naphthothiazole or β-naphthoselenazole ring, Z 2 represents the grouping necessary for the formation of benzoxazole ring, A 1 represents a hydrogen atom, an alkyl radical or an aryl radical, R 1 represents an alkyl group and R 2 represents a hydroxyalkyl group, a carboxyalkyl group or an alkyl group substituted with a sulfo group, X 1 represents an acid anion group, an l is 1 or 2, the dye forming an intramolecular salt when l is 1: ##EQU2## WHEREIN Z 3 and Z 4 each represents the grouping necessary for the formation of a benzothiazole, benzoselenazole, β-naphthothiazole or β-naphthoselenazole ring, A 2 represents a hydrogen atom, an alkyl radical having less than three carbon atoms or an aryl radical, R 3 and R 4 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, X 2 represents an acid anion group, and m is 1 or 2, the dye forming an intramolecular salt when m is 1.
Inventors
- 👤 Keisuke Shiba
- 👤 Akira Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:54
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/06; C09B23/12; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
241 words
A silver halide photograhic emulsion which is spectrally sensitized so that it has a maximum sensitivity wave length within the region of 580 - 640 nm, characterized by containing in a supersensitizing amount the combination of: at least one carbocyanine dye represented by the general formula (I) and at least one dye represented by the general formula (II) ##EQU3## wherein Z 1 represents the grouping necessary for the formation of β-naphthothiazole or β-naphthoselenazole ring, Z 2 represents the grouping necessary for the formation of benzoxazole ring, A 1 represents a hydrogen atom, an alkyl radical, or an aryl radical, R 1 represents an alkyl radical and R 2 represents a hydroxyalkyl radical, a carboxyalkyl radical or an alkyl radical having a sulfo group, X 1 represents an acid anion group, and l is 1 or 2, the dye forming an intramolecular salt when l is 1: ##EQU4## wherein Z 3 and Z 4 each represents the grouping necessary for the formation of a benzothiazole, benzoselenazole, β-naphthothiazole or β-naphthoselenazole ring, A 2 represents a hydrogen atom, an alkyl radical having less than three carbon atoms or an aryl radical, R 3 and R 4 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, X 2 represents an acid anion group, and m is 1 or 2, the dye forming an intramolecular salt when m is 1.
Claim 2
Dependent Claim
241 words
A silver halide photograhic emulsion which is spectrally sensitized so that it has a maximum sensitivity wave length within the region of 580 - 640 nm, characterized by containing in a supersensitizing amount the combination of: at least one carbocyanine dye represented by the general formula (I) and at least one dye represented by the general formula (II) ##EQU3## wherein Z 1 represents the grouping necessary for the formation of β-naphthothiazole or β-naphthoselenazole ring, Z 2 represents the grouping necessary for the formation of benzoxazole ring, A 1 represents a hydrogen atom, an alkyl radical, or an aryl radical, R 1 represents an alkyl radical and R 2 represents a hydroxyalkyl radical, a carboxyalkyl radical or an alkyl radical having a sulfo group, X 1 represents an acid anion group, and l is 1 or 2, the dye forming an intramolecular salt when l is 1: ##EQU4## wherein Z 3 and Z 4 each represents the grouping necessary for the formation of a benzothiazole, benzoselenazole, β-naphthothiazole or β-naphthoselenazole ring, A 2 represents a hydrogen atom, an alkyl radical having less than three carbon atoms or an aryl radical, R 3 and R 4 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, X 2 represents an acid anion group, and m is 1 or 2, the dye forming an intramolecular salt when m is 1.
Claim 3
Dependent Claim
73 words
The silver halide photographic emulsion of claim 1, wherein the hetero ring formed by Z 2 , Z 3 and Z 4 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
153 words
The silver halide photographic emulsion of claim 1, wherein Z 2 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 A 1 and A 2 each is a hydrogen atom, a methyl, ethyl, propyl, phenethyl or phenyl radical; wherein R 1 , R 3 and R 4 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 group; wherein Z 3 and Z 4 each is a benzothiazole, 5-chlorobenzothiazole, 5-fluorobenzothiazole, 5-bromo-6-methyl benzothiazole, 5-cyanobenzothiazole, 5-cyano-6-chlorobenzothiazole, 5-methyl benzothiazole, 7-dimethylaminobenzothiazole, 5-phenyl benzothiazole, 5-p-methoxyphenyl benzothiazole, 5-phenoxy benzothiazole, 5-trifluoromethylbenzothiazole, 5-dimethylaminocarbonylbenzothiazole, 5-methoxycarbonyl benzothiazole, 5-hydroxy benzothiazole, benzoselenazole, 5-methyl benzoselenazole, β-naphthothiazole or β-naphthoselenazole ring; and X 1 and X 2 each represents an iodine, bromine, chlorine, p-toluene sulfonic acid, benzene sulfonic acid, ethyl sulfate, perchlorate, or rhodan ions.
Claim 5
Dependent Claim
27 words
The silver halide photographic emulsion of claim 1, wherein said dye of the general formula (I) is ##SPC3## wherein said dye of general formula (II) is ##SPC4##
Claim 6
Dependent Claim
74 words
The silver halide photographic emulsion of claim 1, wherein said dyes of the general formula (I) and (II) are present at a level of from about 5 × 10 - 3 to 1 × 10 - 6 mol of dye per mol of silver and wherein the molar ratio of the amount of dye of the general formula (II) to the amount of dye of the general formula (I) is about 1:100 to 1:1.
Claim 7
Dependent Claim
48 words
The silver halide photographic emulsion of claim 1, wherein Z 1 is a β-naphthothiazole ring, Z 2 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 A 1 is an ethyl group.
Claim 8
Dependent Claim
46 words
The silver halide photographic emulsion of claim 1, wherein A 2 is a methyl group or an ethyl group, wherein R 3 and R 4 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
23 words
The silver halide photographic emulsion of claim 1, wherein said emulsion additionally contains a cyan coupler of the phenol series or naphthol series.
Claim 10
Dependent Claim
17 words
A silver halide photograhic material comprising a support having thereon the silver halide emulsion of claim 1.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-08-31 | 1980-03-01 | 1980-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-08-31 | 1984-03-01 | 1984-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-08-31 | 1988-03-01 | 1988-08-31 | $7700.00 | Window Closed / Lapsed |