US3617294A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spectrally sensitized silver halide photographic emulsion
Assignee: Fujifilm Holdings Corp
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Filing: 1969-09-09
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Granted: 1971-11-02
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Expires: 1989-09-09
Abstract
Abstract Photographic silver halide emulsions and color photographic light-sensitive materials containing same, which emulsions comprise at least one benzimidazolocarbocyanine dye combined with at least one pseudocyanine dye containing either a benzothiazole or benzoselenazole nucleus and hydroxy-substituted at the 5position thereof. The emulsions may optionally contain, in addition a compound containing a benzimidazole nucleus. The emulsions resulting from the above combination of ingredients are green-sensitive emulsions possessing a uniformly high spectrally sensitized sensitivity over a region from 480 to 580 Mu and are not affected adversely by the presence of a color coupler in the emulsion. Further, the above combination of additives do not produce color stain upon development.
Inventors
- 👤 Keisuke Shiba
- 👤 Masanao Hinata
- 👤 Akira Sato
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:55
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/28; G03C1/29
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
44 words
The photographic silver halide emulsion of claim 1 wherein said benzimidazolenucleus in general formula I is substituted by at least one member selected from the group consisting of a halogen atom, a cyano group, a trichloromethyl group, an alkylaminosulfonyl group and an acetyl group.
Claim 2
Dependent Claim
45 words
The photographic silver halide emulsion of claim 1 wherein said quinoline nucleus in general formula II is substituted by at least one member selected from the group consisting of a methyl group, an ethyl group, a hydroxyl group, an alkoxyl group and a halogen atom.
Claim 3
Dependent Claim
63 words
The photographic silver halide emulsion of claim 1 wherein said sulfo-substituted alkyl group represented by R3 or R4 in general formula I and R5 or R6 in general formula II is selected from the group consisting of a Beta -sulfoethyl group, a gamma -sulfopropyl group, a gamma -sulfobutyl group, a delta -sulfobutyl group, a 2-hydroxy-1-sulfopropyl group, a 2-(3-sulfopropoxy)ethyl group, and a 2-(2-(3-sulfopropoxy)ethoxy)ethyl group.
Claim 4
Dependent Claim
49 words
The photographic silver halide emulsion of claim 1 wherein said carboxy-substituted alkyl group represented by R3 or R4 in general formula I and R5 and R6 in general formula II is selected from the group consisting of a Beta -carboxyethyl group, an Alpha -carboxypropyl group and a 2-(2-carboxy-ethoxy)ethyl group.
Claim 5
Dependent Claim
32 words
The photographic silver halide emulsion of claim 1 wherein said silver halide emulsion containing said cyanine dyes is a green-sensitive silver halide emulsion containing a magenta coupler for color photographic light-sensitive material.
Claim 6
Dependent Claim
25 words
A color photographic light-sensitive material comprising a support and at least one layer of a photographic silver halide emulsion as set forth in claim 1.
Claim 7
Dependent Claim
22 words
A photographic silver halide emulsion as set forth in claim 1 further comprising at least one compound represented by general formula III
Claim 8
Dependent Claim
29 words
The photographic silver halide emulsion of claim 8 wherein said silver halide emulsion is a green sensitive silver halide emulsion containing a magenta coupler for color photographic light-sensitive material.
Claim 9
Dependent Claim
24 words
A color photographic light-sensitive material comprising a support and at least one layer of a silver halide emulsion as set forth in claim 8.
References Cited (Backward Citations)
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US2973264A
Cited
US3255012A
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US3348949A
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US3463640A
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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) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |