Patent US4555482A successfully refreshed from Google Patents.
US4555482A
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Silver halide photographic emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1983-12-20
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Granted: 1985-11-26
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Expires: 2003-12-20
Abstract
Abstract A silver halide photographic emulsion is disclosed. The emulsion includes a silver halide emulsion which has dispersed therein at least three types of sensitizing dyes. The emulsion includes at least one dye represented by the formula (I), at least one dye represented by the formula (II) and at least one dye represented by the formula (III). Each of the structural formulae and their substituents are defined within the specification. The resulting silver halide photographic emulsion shows a small decrease in the inherent sensitivity of the silver halide due to the sensitizing dye used.
Inventors
- 👤 Noriyuki Inoue
- 👤 Masaki Okazaki
- 👤 Kiyohiko Yamamuro
- 👤 Haruo Takei
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
393 words
A silver halide photographic emulsion, comprising: a vehicle having dispersed therein: silver halide particles; a sensitizing dye having the formula (I); a sensitizing dye having the formula (II); and a sensitizing dye having the formula (III); ##STR6## wherein R 1 is a hydrogen atom or a lower alkyl group; R 2 is an unsubstituted or substituted alkyl group; R 3 is a substituted alkyl group; R 5 , R 6 , R 9 and R 10 , which may be the same or different, each represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a hydroxy group, an alkoxy group, a carboxy group, an alkoxycarbonyl group or an acylamino group; R 4 , R 7 , R 8 and R 11 , which may be the same or different, each represents a hydrogen atom or an alkyl group; R 4 and R 5 , R 6 and R 7 , R 8 and R 9 or R 10 and R 11 may, when taken together, form a benzene ring; X 1 .sup.⊖ is an acid anion; l is 0 or 1, and when an intramolecular salt is formed, l is 0; ##STR7## wherein R 12 and R 13 each represents an unsubstituted or substituted alkyl group; R 15 , R 16 , R 19 and R 20 are the same as R 5 , R 6 , R 9 and R 10 , respectively; R 14 , R 17 , R 18 and R 21 each represents a hydrogen atom or an alkyl group; X 2 .sup.⊖ is an acid anion; m is 0 or 1, and when an intramolecular salt is formed, m is 0; and ##STR8## wherein R 22 and R 23 are the same as R 12 and R 13 , respectively; R 25 , R 26 , R 29 and R 30 are the same as R 5 , R 6 , R 9 and R 10 , respectively; R 24 , R 27 , R 28 and R 31 are the same as R 14 , R 17 , R 18 and R 21 , respectively; X 3 .sup.⊖ is an acid anion; m is 0 or 1, and when an intramolecular salt is formed, n is 0; R 32 is a hydrogen atom or a lower alkyl group other than a methyl group.
Claim 2
Dependent Claim
393 words
A silver halide photographic emulsion, comprising: a vehicle having dispersed therein: silver halide particles; a sensitizing dye having the formula (I); a sensitizing dye having the formula (II); and a sensitizing dye having the formula (III); ##STR6## wherein R 1 is a hydrogen atom or a lower alkyl group; R 2 is an unsubstituted or substituted alkyl group; R 3 is a substituted alkyl group; R 5 , R 6 , R 9 and R 10 , which may be the same or different, each represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group, a hydroxy group, an alkoxy group, a carboxy group, an alkoxycarbonyl group or an acylamino group; R 4 , R 7 , R 8 and R 11 , which may be the same or different, each represents a hydrogen atom or an alkyl group; R 4 and R 5 , R 6 and R 7 , R 8 and R 9 or R 10 and R 11 may, when taken together, form a benzene ring; X 1 .sup.⊖ is an acid anion; l is 0 or 1, and when an intramolecular salt is formed, l is 0; ##STR7## wherein R 12 and R 13 each represents an unsubstituted or substituted alkyl group; R 15 , R 16 , R 19 and R 20 are the same as R 5 , R 6 , R 9 and R 10 , respectively; R 14 , R 17 , R 18 and R 21 each represents a hydrogen atom or an alkyl group; X 2 .sup.⊖ is an acid anion; m is 0 or 1, and when an intramolecular salt is formed, m is 0; and ##STR8## wherein R 22 and R 23 are the same as R 12 and R 13 , respectively; R 25 , R 26 , R 29 and R 30 are the same as R 5 , R 6 , R 9 and R 10 , respectively; R 24 , R 27 , R 28 and R 31 are the same as R 14 , R 17 , R 18 and R 21 , respectively; X 3 .sup.⊖ is an acid anion; m is 0 or 1, and when an intramolecular salt is formed, n is 0; R 32 is a hydrogen atom or a lower alkyl group other than a methyl group.
Claim 3
Dependent Claim
34 words
A silver halide photographic emulsion as claimed in claim 1, wherein R 2 , R 20 , R 13 , R 22 and R 23 represent alkyl groups containing 1 to 8 carbon atoms.
Claim 4
Dependent Claim
44 words
A silver halide photographic emulsion as claimed in claim 1, wherein R 2 , R 3 , R 12 , R 13 , R 22 and R 23 each represents a substituted alkyl group containing 1 to 8 carbon atoms in the alkyl moiety.
Claim 5
Dependent Claim
23 words
A silver halide photographic emulsion as claimed in claim 1, wherein R 1 represents an alkyl group containing 1 to 4 carbon atoms.
Claim 6
Dependent Claim
64 words
A silver halide photographic emulsion as claimed in claim 1, wherein R 5 , R 6 , R 9 , R 10 , R 15 , R 16 , R 19 , R 20 , R 25 , R 26 , R 29 and R 30 each represents a hydrogen atom, a halogen atom, or an alkyl group containing 1 to 6 carbon atoms.
Claim 7
Dependent Claim
45 words
A silver halide photographic emulsion as claimed in claim 1, wherein each of the sensitizing dyes represented by the formulae (I), (II) and (III) are present in an amount in the range of 2×10 -6 mol to 2×10 -3 mol per mol of silver halide.
Claim 8
Dependent Claim
58 words
A silver halide photographic emulsion as claimed in claim 1, wherein the molar ratio of the dye of formula (I) to the dye of formula (II) is in the range of 10:1 to 1:10 and the molar ratio of the dye of formula (II) to the dye of formula (III) is in the range of 10:1 to 1:10.
Claim 9
Dependent Claim
57 words
A silver halide photographic emulsion as claimed in claim 7, wherein the molar ratio of the dye of formula (I) to the dye of formula (II) is in the range of 2:1 to 1:8 and the ratio of the dye of formula (II) to the dye of formula (III) is in the range of 4:1 to 1:2.
Claim 10
Dependent Claim
58 words
A silver halide photographic emulsion as claimed in claim 8, wherein the molar ratio of the dye of formula (I) to the dye of formula (II) is in the range of 2:1 to 1:4 and the molar ratio of the dye of formula (II) to the dye of formula (III) is in the range of 2:1 to 1:2.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |