Patent US3887381A successfully refreshed from Google Patents.
US3887381A
Expired / Lapsed
US
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Spectral sensitization of photographic light-sensitive emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1973-03-30
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Granted: 1975-06-03
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Expires: 1993-03-30
Abstract
Abstract A method for sensitizing spectrally, a photographic sensitive emulsion, which comprises: A. DISSOLVING A METHINE DYE CONTAINING AT LEAST ONE WATERSOLUBLE GROUP IN AN ORGANIC SOLVENT HAVING A WATER SOLUBILITY OF 10% BY WEIGHT OR LESS AT 35* C, b. dispersing the solution in a member selected from the group consisting of water and a hydrophilic colloid of 2% by weight or less, and C. SUBSEQUENTLY TO THE DISPERSING STEP, ADDING THE DISPERSION TO A LIGHT-SENSITIVE EMULSION.
Inventors
- 👤 Keisuke Shiba
- 👤 Hotohiko Tsubota
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12
Claims Analysis
Total Claims: 30
Claim 1
Independent Claim
86 words
A method for sensitizing spectrally, a photographic light sensitive emulsion, comprising silver halide dispersed in a hydrophilic colloid comprising a. dissolving a methine dye containing at least one water-soluble group in an organic solvent having a water solubility of 10% by weight or less at 35*C, b. dispersing the solution in a member selected from the group consisting of water and a hydrophilic colloid of 2% by weight or less, and c. subsequently to the dispersing step, adding the dispersion to the light-sensitive silver halide emulsion.
Claim 2
Independent Claim
86 words
A method for sensitizing spectrally, a photographic light sensitive emulsion, comprising silver halide dispersed in a hydrophilic colloid comprising a. dissolving a methine dye containing at least one water-soluble group in an organic solvent having a water solubility of 10% by weight or less at 35*C, b. dispersing the solution in a member selected from the group consisting of water and a hydrophilic colloid of 2% by weight or less, and c. subsequently to the dispersing step, adding the dispersion to the light-sensitive silver halide emulsion.
Claim 3
Independent Claim
85 words
A METHOD FOR SENSITIZING SPECTRALLY, A PHOTOGRAPHIC LIGHT SENSITIVE EMULSION, COMPRISING SILVER HALIDE DISPERSED INA HYDROPHILIC COLLOID COMPRISING A. DISSOLVING A METHINE DYE CONTAINING AT LEAST ONE WATERSOLUBLE GROUP IN AN ORGANIC SOLVENT HAVING A WATER SOLUBILITY OF 10% BY WEIGHT OR LESS AT 35*C, B. DISPERSING THE SOLUTION IN A MEMBER SELECTED FROM THE GROUP CONSISTING OF WATER AND A HYDROPHILIC COLLOID OF 2% BY WEIGHT OR LESS, AND C. SUBSEQUENTLY TO THE DISPERSING STEP, ADDING THE DISPERSION TO THE LIGHT-SENSITIVE SILVER HALIDE EMULSION.
Claim 4
Independent Claim
85 words
A METHOD FOR SENSITIZING SPECTRALLY, A PHOTOGRAPHIC LIGHT SENSITIVE EMULSION, COMPRISING SILVER HALIDE DISPERSED INA HYDROPHILIC COLLOID COMPRISING A. DISSOLVING A METHINE DYE CONTAINING AT LEAST ONE WATERSOLUBLE GROUP IN AN ORGANIC SOLVENT HAVING A WATER SOLUBILITY OF 10% BY WEIGHT OR LESS AT 35*C, B. DISPERSING THE SOLUTION IN A MEMBER SELECTED FROM THE GROUP CONSISTING OF WATER AND A HYDROPHILIC COLLOID OF 2% BY WEIGHT OR LESS, AND C. SUBSEQUENTLY TO THE DISPERSING STEP, ADDING THE DISPERSION TO THE LIGHT-SENSITIVE SILVER HALIDE EMULSION.
Claim 5
Dependent Claim
31 words
The method of claim 1, wherein said water-soluble group is a member selected from the group consisting of a carboxyl group, a sulfo group, a sulfate group and a phosphate group.
Claim 6
Dependent Claim
30 words
The method of claim 1, wherein said methine dye comprises a cyanine nucleus having a sulfo-containing substituted alkyl group of from 1 to 5 carbon atoms as the N-substitute thereof.
Claim 7
Dependent Claim
18 words
The method of claim 1, wherein the methine dye is a member selected from the group consisting of:
Claim 8
Dependent Claim
17 words
The method of claim 1, wherein at least two methine dyes are used in a supersensitizing combination.
Claim 9
Dependent Claim
23 words
The method of claim 1, wherein said organic solvent is a material containing a hydrophilic group and a hydrophobic aromatic or aliphatic radical.
Claim 10
Dependent Claim
28 words
The method of claim 6, wherein said hydrophilic group is a member selected from the group consisting of a hydroxyl group, an ester group and a keto group.
Claim 11
Dependent Claim
32 words
The method of claim 1, wherein the organic solvent is a member selected from the group consisting of methyl-phenylcarbinol, 2-pentanol, diisobutylcarbinol, mesityl oxide, methyl isobutyl ketone, isopropyl acetate, cellosolve acetate and 2-phenoxyethanol.
Claim 12
Dependent Claim
39 words
The method of claim 1, wherein said hydrophilic colloid is a member selected from the group consisting of gelatin, polyvinylpyrrolidone polymer, copolymers of polyvinylpyrrolidone, cellulose derivative, alginate polymer, polyvinyl alcohol, polyacrylic acid polymer, maleic anhydride polymer, and polyvinylbenzenesulfonate polymer.
Claim 13
Dependent Claim
49 words
The method of claim 9, wherein the polymer contains a member selected from the group consisting of a sulfo group, a carboxyl group, a thiosulfonate group, a thiosulfate group, an ammonium group, an amino group, a cyano group, a hydroxyl group, a ureido group, and an ethylene oxide group.
Claim 14
Dependent Claim
29 words
The method of claim 9, wherein the cellulose derivative is a member selected from the group consisting of carboxymethyl cellulose, carboxyethyl cellulose, cellulose alginate, and partially hydrolyzed cellulose acetate.
Claim 15
Dependent Claim
28 words
The method of claim 9, wherein the polyVinylpyrrolidone copolymer is a copolymer of polyvinylpyrrolidone with a member selected from the group consisting of acrylic amide and vinyl acetate.
Claim 16
Dependent Claim
23 words
The method of claim 9, wherein the molecular weight range of the polymers employed ranges from 1 X 104 to 2 X 105.
Claim 17
Dependent Claim
23 words
The method of claim 9, wherein the molecular weight of the cellulose derivatives employed ranges from 1 X 104 to 2 X 105.
Claim 18
Dependent Claim
22 words
The method of claim 9, wherein the molecular weight of the polyvinylpyrrolidone polymer ranges from 1 X 104 to 1 X 106.
Claim 19
Dependent Claim
22 words
The method of claim 9, wherein the molecular weight of the polyvinylpyrrolidone copolymer ranges from 1 X 104 to 2 X 105.
Claim 20
Dependent Claim
15 words
The method of claim 1, wherein the light-sensitive emulsion is a gelatino silver halide emulsion.
Claim 21
Dependent Claim
37 words
The method of claim 1, wherein the amount of a dye present is within the range of from 1 X 10 7 to 1 X 10 3 mol of dye per one mol of the light-sensitive material.
Claim 22
Dependent Claim
14 words
A photographic light-sensitive silver halide emulsion spectrally sensitized by the method of claim 1.
Claim 23
Dependent Claim
22 words
A photographic light-sensitive silver halide element, which comprises a support having thereon at least a layer containing the emulsion of claim 1.
Claim 24
Dependent Claim
39 words
The photographic light-sensitive silver halide element of claim 20, wherein said support is selected from the group consisting of polyethylene terephthalate, baryta paper, paper, resin laminated paper, synthetic paper, glass sheet, plastic film, metallic sheet and cellulose derivative film.
Claim 25
Dependent Claim
16 words
The method of claim 1, wherein in step b the solution is dispersed in the water.
Claim 26
Dependent Claim
23 words
The method of claim 1, wherein in step b the solution is dispersed in the hydrophilic colloid of 2% by weight or less.
Claim 27
Dependent Claim
13 words
The method of claim 1, wherein said water-soluble group is a carboxyl group.
Claim 28
Dependent Claim
13 words
The method of claim 1, wherein said water-soluble group is a sulfo group.
Claim 29
Dependent Claim
13 words
The method of claim 1, wherein said water-soluble group is a sulfate group.
Claim 30
Dependent Claim
13 words
The method of claim 1, wherein said water-soluble group is a phosphate group.
References Cited (Backward Citations)
US2519001A
Cited
US3469987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |