US3967967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrally sensitized silver halide photographic emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1974-12-06
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Granted: 1976-07-06
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Expires: 1994-12-06
Abstract
Abstract A silver halide photographic emulsion containing, in combination, supersensitizing amounts of at least two carbocyanine dyes having structures hereinafter defined.
Inventors
- 👤 Masanao Hinata
- 👤 Haruo Takei
- 👤 Akira Sato
- 👤 Atsuo Iwamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:17
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
333 words
A silver halide photographic emulsion containing, in combination, supersensitizing amounts of (A) at least one sensitizing dye of the following general formula (I) ##EQU5## wherein Z 1 represents an atomic group required to form a benzimidazole ring; Z 2 represents an atomic group required to form a benzoselenazole ring; R 1 and R 2 each represents an aliphatic group, with at least one of R 1 and R 2 being a carboxy-containing alkyl group or a sulfo-containing alkyl group; R 3 is a hydrogen atom or an alkyl group; X 1 is an acid anion; and m is 1 or 2, and when m is 1 the dye forms an intramolecular salt; and (B) at least one sensitizing dye selected from the group consisting of a sensitizing dye of the following general formula (II) ##EQU6## wherein Z 3 represents an atomic group required to form a benzothiazole ring, a β-naphthothizole ring or a 62-naphthoselenazole ring; Z 4 represents an atomic group required to form a benzimidazole ring; R 4 and R 5 each represents an aliphatic group, with at least one of R 4 and R 5 being a carboxy-containing alkyl group or a sulfo-containing alkyl group; R 6 is a hydrogen atom or an alkyl group; X 2 is an acid anion; and n is 1 or 2, and when n is 1 the dye forms an intramolecular salt; and a sensitizing dye of the following general formula (III) ##EQU7## wherein Z 5 represents an atomic group required to form a benzothiazole ring or a benzoselenazole ring; Z 6 represents an atomic group required to form a benzoxazole ring; R 7 and R 8 each represents an aliphatic group, with at least one of R 7 and R 8 being a carboxy-containing alkyl group or a sulfo-containing alkyl group; R 9 is a hydrogen atom or an alkyl group; X 3 is an acid anion; and p is 1 or 2, and when p is 1 the dye forms an intramolecular salt.
Claim 2
Dependent Claim
333 words
A silver halide photographic emulsion containing, in combination, supersensitizing amounts of (A) at least one sensitizing dye of the following general formula (I) ##EQU5## wherein Z 1 represents an atomic group required to form a benzimidazole ring; Z 2 represents an atomic group required to form a benzoselenazole ring; R 1 and R 2 each represents an aliphatic group, with at least one of R 1 and R 2 being a carboxy-containing alkyl group or a sulfo-containing alkyl group; R 3 is a hydrogen atom or an alkyl group; X 1 is an acid anion; and m is 1 or 2, and when m is 1 the dye forms an intramolecular salt; and (B) at least one sensitizing dye selected from the group consisting of a sensitizing dye of the following general formula (II) ##EQU6## wherein Z 3 represents an atomic group required to form a benzothiazole ring, a β-naphthothizole ring or a 62-naphthoselenazole ring; Z 4 represents an atomic group required to form a benzimidazole ring; R 4 and R 5 each represents an aliphatic group, with at least one of R 4 and R 5 being a carboxy-containing alkyl group or a sulfo-containing alkyl group; R 6 is a hydrogen atom or an alkyl group; X 2 is an acid anion; and n is 1 or 2, and when n is 1 the dye forms an intramolecular salt; and a sensitizing dye of the following general formula (III) ##EQU7## wherein Z 5 represents an atomic group required to form a benzothiazole ring or a benzoselenazole ring; Z 6 represents an atomic group required to form a benzoxazole ring; R 7 and R 8 each represents an aliphatic group, with at least one of R 7 and R 8 being a carboxy-containing alkyl group or a sulfo-containing alkyl group; R 9 is a hydrogen atom or an alkyl group; X 3 is an acid anion; and p is 1 or 2, and when p is 1 the dye forms an intramolecular salt.
Claim 3
Dependent Claim
40 words
The silver halide photographic emulsion of claim 1, wherein the molar ratio of the sensitizing dye of the general formula (II) or of the general formula (III) to the sensitizing dye of the general formula (I) is 1:10 to 1:1.
Claim 4
Dependent Claim
48 words
The silver halide photographic emulsion of claim 1, wherein the heterocyclic ring formed by Z 1 is a benzoimidazole ring unsubstituted at the 5- and 6-positions or substituted with a chlorine atom at at least one of the 5- and 6-positions; and R 3 is a hydrogen atom.
Claim 5
Dependent Claim
48 words
The silver halide photographic emulsion of claim 1, wherein the heterocyclic ring formed by Z.sub. 4 is a benzimidazole ring unsubstituted at the 5- and 6-position or substituted with a chlorine atom at at least one of the 5- and 6-positions; and R 6 is a hydrogen atom.
Claim 6
Dependent Claim
43 words
The silver halide photographic emulsion of claim thereon wherein the heterocyclic ring formed by Z 3 is a benzothiazole ring unsubstituted at the 5-position or substituted at the 5-position with a methoxy group, a methyl group, a phenyl group or a chlorine atom.
Claim 7
Dependent Claim
97 words
The silver halide photographic emulsion of claim 1, wherein the heterocyclic ring formed by Z 5 is a benzothiazole or benzoselenazole ring unsubstituted at the 5-position or substituted at the 5-position with a methyl group, a methoxy group, a phenyl group or a chlorine atom; the heterocyclic ring formed by Z 6 is a benzoxazole ring unsubstituted at the 5-position or substituted at the 5-position with a methyl group, a methoxy group, a phenyl group or a chlorine atom; and at least one of R 7 and R 8 is a sulfoalkyl group or a carboxyalkyl group.
Claim 8
Dependent Claim
26 words
The silver halide photographic emulsion of claim 1, wherein at least one of R 1 and R 2 is a sulfoalkyl group or a carboxyalkyl group.
Claim 9
Dependent Claim
26 words
The silver halide photographic emulsion of claim 1, wherein at least one of R 4 and R 5 is a sulfoalkyl group or a carboxyalkyl group.
Claim 10
Dependent Claim
83 words
The silver halide photographic emulsion of claim 1, wherein the heterocyclic ring formed by Z 4 is a benzimidazole ring unsubstituted at the 5- and 6-position or substituted with a chlorine atom at at least one of the 5- and 6-positions; and R 6 is a hydrogen atom and the heterocyclic ring formed by Z 3 is a benzothiazole ring unsubstituted at the 5-position or substituted at the 5-position with a methoxy group, a methyl group, a phenyl group or a chlorine atom.
Claim 11
Dependent Claim
16 words
A photographic material comprising a support having thereof the silver halide photographic 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) | 1979-07-06 | 1980-01-05 | 1980-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-06 | 1984-01-05 | 1984-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-06 | 1988-01-05 | 1988-07-06 | $7700.00 | Window Closed / Lapsed |