US3713832A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solarization type silver halide emulsion containing a halogenated hydroxyphthalein sensitizing dye and a desensitizing compound
Assignee: Fujifilm Holdings Corp
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Filing: 1969-07-15
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Granted: 1973-01-30
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Expires: 1989-07-15
Abstract
Abstract X1, X2, X3, X4, or X5 can be hydrogen atom or a halogen atom, q can be 1, 2, 3 or 4, M can be a hydrogen atom, an alkali metal, NH4 or an alkaline earth metal, Y represents non-metallic atoms necessary to complete a heterocyclic ring, R can be an alkyl group or a substituted alkyl group, a, b, and r can be 1 or 2, and X represents an anion. AND AT LEAST ONE DESENSITIZING COMPOUND REPRESENTED BY EITHER OF THE FOLLOWING TWO GENERAL FORMULAS: A direct positive silver halide photographic emulsion illustrates improved qualities when it contains at least one dye represented by the following general formula:
Inventors
- 👤 K Shiba
- 👤 M Hinata
- 👤 M Sawahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:15
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523; G03C1/4853; Y; Y10; Y10S; Y10S430/00; Y10S430/141
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
27 words
A direct positive silver halide photographic emulsion which has been previously fogged to maximum density containing at least one dye represented by the following general Formula (I):
Claim 2
Dependent Claim
27 words
A direct positive silver halide photographic emulsion which has been previously fogged to maximum density containing at least one dye represented by the following general Formula (I):
Claim 3
Dependent Claim
38 words
The direct positive silver halide photographic emulsion claimed in claim 1, wherein the halogen atoms in X1, X2, X3, X4 and X5 of the general Formula (I) are selected from the group consisting of chlorine, bromine and iodine.
Claim 4
Dependent Claim
42 words
The direct positive silver halide photographic emulsion claimed in claim 1, wherein said heterocyclic rings containing Y in general Formula II are selected from the group consisting of thiazolines, thiazoles, benzothiazoles, naphthothiazoles, oxazoles, benzoxazoles, naphthoxazoles, benzoselenazoles, naphthoselenazoles, benzimidazoles, 2-quinolines, 4-quinolines and indolenines.
Claim 5
Dependent Claim
28 words
The direct positive silver halide photographic emulsion claimed in claim 1, wherein said alkyl group in R of the general Formula II is a methyl or ethyl group.
Claim 6
Dependent Claim
39 words
The direct positive silver halide photographic emulsion claimed in claim 1, wherein said substituted alkyl group in R of the general Formula II is selected from the group consisting of 2-hydroxyethyl, 2-methoxyethyl, carboxymethyl, 2-carboxyethyl, 2-sulfoethy, 3-sulfopropyl or carboethoxymethyl group.
Claim 7
Dependent Claim
40 words
The direct positive silver halide photographic emulsion claimed in claim 1, wherein the proportion, by weight, of said dye represented by general formula I to said desensitizing compound represented by general Formula II or III is from 1:10 to 10:1.
Claim 8
Dependent Claim
38 words
The process which comprises coating am emulsion as recited in claim 1 onto a support and thereafter imagewise exposing said emulsion; and developing said exposed emulsion to form a silver image in the unexposed areas of the emulsion.
Claim 9
Dependent Claim
31 words
The direct positive silver halide photographic emulsion of claim 1, wherein said dye represented by general Formula I is present in an amount of from 10 to 150 mg/Kg of emulsion.
Claim 10
Dependent Claim
31 words
The direct positive silver halide photographic emulsion of claim 1, wherein said dye represented by general Formula I is present in an amount of from 20 to 100 mg/Kg of emulsion.
Claim 11
Dependent Claim
27 words
The direct positive silver halide photographic emulsion of claim 1, wherein said dye represented by general Formula I is a member selected from the group Consisting of
Claim 12
Dependent Claim
28 words
The direct positive silver halide photographic emulsion of claim 1, wherein said desensitizing compound represented by general Formula II is a member selected from the group consisting of
Claim 13
Dependent Claim
28 words
The direct positive silver halide photographic emulsion of claim 1, wherein said desensitizing compound represented by general Formula III is a member selected from the group consisting of
Claim 14
Dependent Claim
21 words
The process of claim 7, wherein said dye is present in an amount of from 10 to 150 mg/Kg of emulsion.
Claim 15
Dependent Claim
21 words
The process of claim 7, wherein said dye is present in an amount of from 20 to 100 mg/Kg of emulsion.
Claim 16
Dependent Claim
25 words
The process of claim 7, wherein the proportion, by weight, of said dye to said compounds is within the range of from 1:10 to 10:1.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |