US3881933A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive material undergoing little change of latent image formed therein
Assignee: Fujifilm Holdings Corp
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Filing: 1973-09-17
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Granted: 1975-05-06
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Expires: 1993-09-17
Abstract
Abstract A gelatino-silver halide photographic emulsion containing 1. AT LEAST ONE OF A MONOMETHINE OR A TRIMETHINE CYANINE DYE HAVING A CATHODE POLAROGRAPHIC HALF WAVE POTENTIAL RANGING FROM -0.9 AND -1.8 VOLT AND AN ANODE POLAROGRAPHIC HALF WAVE POTENTIAL LOWER THAN 1.3 VOLT AND CAPABLE OF FORMING Jaggregate, and 2. AN ORGANIC COMPOUND WHICH CAUSES BRIDGING TO EFFECT A HARDENING ACTION AND, AT THE SAME TIME, REACTS WITH GELATIN RELEASING AN ORGANIC OR AN INORGANIC ACID IS DISCLOSED.
Inventors
- 👤 Akira Kumai
- 👤 Keisuke Shiba
- 👤 Nobuo Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:34
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/30; G03C1/08; G03C1/10; G03C1/12; G03C1/14
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
96 words
A METHOD FOR PREVENTING FADING OF A LATENT IMAGE IN AN EXPOSED GELATINO-SILVER HALIDE PHOTOGRAPHIC EMULSION WHICH COMPRISES ADDING TO SAID PHOTOGRAPHIC EMULSION (1) AT LEAST ONE OF A MONOMETHINE OR A TRIMETHINE CYANINE DYE HAVING A CATHODE POLAROGRAPHIC OR A TRIMMETHINE CYANINE DYE HAVING A AND-1.8 VOLT AND AN ANODE POLARGRAPHIC HALF WAVE POTENTIAL LOWER THAN 1.3 VOLT AND CAPABLE OF FORMING J-AGGREGATE, AND (2) AN ORGANIC COMPOUND WHICH CAUSES BRIDGING TO EFFECT A HARDENING ACTION BY REACTION WITH GELATIN AND, AT THE SAME TIME, REACTS WITH GELATIN RELEASING AN ORGANIC OR AN INORGANIC ACID.
Claim 2
Independent Claim
96 words
A METHOD FOR PREVENTING FADING OF A LATENT IMAGE IN AN EXPOSED GELATINO-SILVER HALIDE PHOTOGRAPHIC EMULSION WHICH COMPRISES ADDING TO SAID PHOTOGRAPHIC EMULSION (1) AT LEAST ONE OF A MONOMETHINE OR A TRIMETHINE CYANINE DYE HAVING A CATHODE POLAROGRAPHIC OR A TRIMMETHINE CYANINE DYE HAVING A AND-1.8 VOLT AND AN ANODE POLARGRAPHIC HALF WAVE POTENTIAL LOWER THAN 1.3 VOLT AND CAPABLE OF FORMING J-AGGREGATE, AND (2) AN ORGANIC COMPOUND WHICH CAUSES BRIDGING TO EFFECT A HARDENING ACTION BY REACTION WITH GELATIN AND, AT THE SAME TIME, REACTS WITH GELATIN RELEASING AN ORGANIC OR AN INORGANIC ACID.
Claim 3
Dependent Claim
23 words
The gelatino-silver halide photographic emulsion fading preventing method of claim 1 wherein the fading preventing components consist essentially of components (1) and (2).
Claim 4
Dependent Claim
23 words
The gelatino-silver halide photographic emulsion fading preventing method of claim 1 wherein the cyanine dye is represented by the following general formula (I):
Claim 5
Dependent Claim
39 words
The gelatino-silver halide photographic emulsion fading preventing method of claim 3, wherein said organic compound is selected from the group consisting of 2,3-dihalogenomalealdehydic acids, 2,4-dichloro-S-triazines, chloropyrimidines, chlorotriazine ring side chain containing polymers, dichlorophosphoamides, halomethylS, phosphonitrile chlorides and 2-phenoxy-3-halogeno-malealdehydic acids.
Claim 6
Dependent Claim
133 words
The gelatino-silver halide photographic emulsion fading preventing method of claim 4, wherein said benzene or naphthylene nucleus completed by Z1 or Z2 is substituted by a lower alkyl group having from 1 to about 6 carbon atoms, a halogen atom, an alkoxycarbonyl group, a phenyl group, or an alkoxy group having from 1 to about 4 carbon atoms, wherein said benzene or naphthalene nucleus completed by Z3 or Z4 is substituted by a hydrogen atom, a cyano group, an alkoxycarbonyl group, a trifluoromethyl group, an alkylsulfonyl group, an alkylsulfamoyl group, an alkylcarbamoyl group, an acetoxy group, a lower alkyl group, or an alkoxy group, and wherein X1 and X2 each are a bromide ion, an iodide ion, a p-toluene sulfonate ion, a perchlorate ion, an ethyl sulfate ion or a benzene sulfonate ion.
Claim 7
Dependent Claim
26 words
The gelatino-silver halide photographic emulsion fading preventing method of claim 4 wherein said dye of the general formula (i) or (ii) has the general formula (iii)
Claim 8
Dependent Claim
22 words
The gelatino-silver halide photographic emulsion fading preventing method of claim 4, wherein the cyanine dye is selected from the group consisting of
Claim 9
Dependent Claim
22 words
The gelatino-silver halide photographic emulsion fading preventing method of claim 3 wherein the organic compound is selected from the group consisting of
Claim 10
Dependent Claim
66 words
The gelatino-silver halide photographic emulsion fading preventing method of claim 4, wherein said cyanine dyes are present at a level ranging from 1 X 10116 6 to 1 X 10116 3 mol per mole of silver halide, and wherein said organic compound is present at a level ranging from about 1 to about 100 g per Kg of gelatin in said emulsion on a dry basis.
Claim 11
Dependent Claim
23 words
The gelatino-silver halide photographic emulsion fading preventing method of claim 4, where said silver halide is silver chlorobromide, silver bromide or silver bromoiodide.
Claim 12
Dependent Claim
18 words
The gelatino-silver halide photographic emulsion fading preventing method of claim 10, wherein said silver halide is silver bromoiodide.
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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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |