Patent US3837862A successfully refreshed from Google Patents.
US3837862A
Expired / Lapsed
US
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Spectrally sensitized silver halide photographic emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1972-09-05
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Granted: 1974-09-24
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Expires: 1992-09-05
Abstract
Abstract A silver halide photographic emulsion sensitized with the combination of (1) at least one dimethine merocyanine dye wherein the carbon atom at the 2-position of an oxazole nucleus bearing an alkyl group containing a sulfo or a carboxyl group on the nitrogen atom at the 3-position thereof and the carbon atom at the 5-position of a 2-thiohydantoin nucleus bearing a hydrogen atom or an alkyl group on the nitrogen atom at the 1- and 3positions thereof are connected with each other through a dimethine chain, and (2) at least one of a J-band type carbocyanine dye wherein a sulfo group-containing alkyl group is attached to the nitrogen atom at the 3-position of a naphthothiazole nucleus, a naphthoselenazole nucleus, a benzothiazole nucleus or a benzoselenazole nucleus and the carbon atom at the 2-position is attached to mesoalkyl-substituted trimethine chain is disclosed.
Inventors
- 👤 K Shiba
- 👤 A Sato
- 👤 A Ogawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:40
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
22 words
The silver halide photographic emulsion as claimed in claim 1, wherein saidd dimethine merocyanine dye is represented by the following general formula;
Claim 2
Dependent Claim
64 words
The silver halide photographic emulsion as claimed in claim 1, wherein said emulsion contains silver chlorobromide or silver chlorobromoiodide grains whose chlorine ion content is at least 30 mol percent, the mode of the grain diameter distribution is 0.8 Mu or less than 0.8 Mu , and at least 80 percent by weight of the grains have the crystal habit with a (1,0,0) face.
Claim 3
Dependent Claim
31 words
The silver halide photographic emulsion as claimed in claim 1, wherein the emulsion additionally contains a group IIb metal salt, a group VIII metal salt or a group IVb metal salt.
Claim 4
Dependent Claim
169 words
The silver halide photographic emulsion as claimed in claim 2, wherein said lower alkyl group for R1 and R2 is a methyl group or an ethyl group, wherein said aryl group for R1 and R2 is a phenyl group, a tolyl group, or a sulfophenyl group, wherein said aromatic ring of the benzene series formed by R1 and R2 forms a benzoxazole nucleus, or a substituted benzoxazole nucleus wherein the substituent is an alkyl group, a halogen atom, a hydroxyl group, an alkoxy group, an aryl group and an acetoxy group, and wherein said aromatic ring of the naphthalene series formed by R1 and R2 forms an Alpha -naphthoxazole nucleus, a Beta , Beta -naphthoxazole nucleus, or a Beta -naphthoxazole nucleus, wherein said alkyl group for R3 and R4 is a methyl group, an ethyl group, a 2-propenyl group, a hydroxyalkyl group, an acetoxyalkyl group, an aminoalkyl group, a carboxyalkyl group, a sulfoalkyl group, or an aralkyl group, wherein said methine groups for L1 and L2 represent CH- or
Claim 5
Dependent Claim
58 words
The silver halide photographic emuLsion as claimed in claim 1 wherein said sensitizing dyes are each present in said emulsion in an amount ranging from 1 X 10 6 mol to 5 X 10 3 mol per mol of silver and wherein the molar ratio of said carbocyanine dye to said merocyanine dye ranges from 1/10:1 to 5:1.
Claim 6
Dependent Claim
24 words
A light sensitive photographic element comprising a support having at least one layer coated thereon of the silver halide photographic emulsion of claim 1.
Claim 7
Dependent Claim
24 words
A light sensitive photographic element comprising a support having at least one layer coated thereon of the silver halide photographic emulsion of claim 2.
Claim 8
Dependent Claim
34 words
The light sensitive photographic element as claimed in claim 7 wherein said support is a synthetic resin film, a paper, a polyolefin coated paper, a paper substitute, a glass plate, or a plastic plate.
Claim 9
Dependent Claim
25 words
The silver halide photographic emulsion as claimed in claim 2 wherein said dye of the general formula II is selected from the group consisting of
Claim 10
Dependent Claim
19 words
The silver halide photographic emulsion as claimed in claim 2, wherein Y1 and Y2 each represents a sulfur atom.
Claim 11
Dependent Claim
19 words
The silver halide photographic emulsion as claimed in claim 2, wherein Y1 and Y2 each represents a selenium atom.
Claim 12
Dependent Claim
28 words
The silver halide photographic emulsion as claimed in claim 2, wherein Z1 and Z2 each represents the atoms necessary to complete an aromatic ring of the benzene series.
Claim 13
Dependent Claim
28 words
The silver halide photographic emulsion as claimed in claim 2, wherein Z1 and Z2 each represents the atoms necessary to complete an aromatic ring of the naphthalene series.
Claim 14
Dependent Claim
17 words
The silver halide photographic emulsion as claimed in claim 2, wherein the substituent on A is SO3M.
Claim 15
Dependent Claim
17 words
The silver halide photographic emulsion as claimed in claim 2, wherein the substituent on A is COOM.
Claim 16
Dependent Claim
36 words
The silver halide photographic emulsion as claimed in claim 1, wherein the sensitizing dye combination consists essentially of at least one of said dimethine merocyanine dyes and at least one of said J-band type carbocyanine dyes.
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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |