Patent US4803152A successfully refreshed from Google Patents.
US4803152A
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Silver halide photographic material containing novel chloride content
Assignee: Fujifilm Holdings Corp
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Filing: 1987-06-05
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Granted: 1989-02-07
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Expires: 2007-06-05
Abstract
Abstract A photogrphic light-sensitive material comparing a support having thereon at least one silver halide emulsion layer, wherein the silver halide emulsion layer comprises a silver chlorobromide emulsion which is substantially free of iodide and has a chloride content which satisfies the following relationship (I) between a mean mole % of silver chloride in grain group (A), in which the grains have sizes not less than the median size in the grain size distribution, and a mean mole % of silver chloride in grain group (B) in which the grains have sizes less than the median size, whereby excellent gradation and wide exposure latitude are achieved, and there is a small dependence on the development conditions. Relationship (I): 1</=[Mean mol % of silver chloride in grain group (A)]-[Mean mol % of silver chloride in grain group (B)]</=99.
Inventors
- 👤 Yasuhito Momoki
- 👤 Kazunori Hasebe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:04
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
119 words
A negative-working photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, wherein said silver halide emulsion layer comprises a silver chlorobromide emulsion which is substantially free of iodide and has a chloride content which statisfies the following relationship (I) between the mean mole% of silver chloride in grain group (A), in which the grains have sizes not less than the median size in the grain size distribution of said silver halide emulsion, and the mean mole% of silver chloride in grain group (B) in which the grains have sizes less than the median size: Relationship (I): 3≦[Mean mole% of silver chloride in grain group (A)]-[Mean mole% of silver chloride in grain group (B)]≦50.
Claim 2
Dependent Claim
119 words
A negative-working photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer, wherein said silver halide emulsion layer comprises a silver chlorobromide emulsion which is substantially free of iodide and has a chloride content which statisfies the following relationship (I) between the mean mole% of silver chloride in grain group (A), in which the grains have sizes not less than the median size in the grain size distribution of said silver halide emulsion, and the mean mole% of silver chloride in grain group (B) in which the grains have sizes less than the median size: Relationship (I): 3≦[Mean mole% of silver chloride in grain group (A)]-[Mean mole% of silver chloride in grain group (B)]≦50.
Claim 3
Dependent Claim
31 words
The negative-working photographic light-sensitive material of claim 1, wherein the difference between the mean mole% of silver chloride in grain group (A) and that in grain group (B) is about 5-30.
Claim 4
Dependent Claim
19 words
The negative-working photographic light-sensitive material of claim 1, wherein the grains have a mean grain size of 0.1-2 μm.
Claim 5
Dependent Claim
19 words
The negative-working photographic light-sensitive material of claim 3, wherein the grains have a mean grain size of 0.2-1.3 μm.
Claim 6
Dependent Claim
21 words
The negative-working photographic light-sensitive material of claim 1, wherein said silver halide emulsion layer contains 1.0 mole% or less of iodide.
Claim 7
Dependent Claim
21 words
The negative-working photographic light-sensitive material of claim 5, wherein said silver halide emulsion layer contains 0.5 mole% or less of iodide.
Claim 8
Dependent Claim
19 words
The negative-working photographic light-sensitive material of claim 6, wherein said silver halide emulsion layer contains 0 mole% of iodide.
Claim 9
Dependent Claim
20 words
The negative-working photographic light-sensitive material of claim 1, wherein said silver halide emulsion has at least two grain size distributions.
Claim 10
Dependent Claim
17 words
The negative-working photographic light-sensitive material of claim 1 wherein said silver halide emulsion is a monodispersed emulsion.
Claim 11
Dependent Claim
21 words
The negative-working photographic light-sensitive material of claim 9, wherein said monodispersed emulsion has a variation coefficient of not more than 0.2.
Claim 12
Dependent Claim
21 words
The negative-working photographic light-sensitive material of claim 10, wherein said monodispersed emulsion has a variation coefficient of not more than 0.15.
Claim 13
Dependent Claim
21 words
The negative-working photographic light-sensitive material of claim 11, wherein said monodispersed emulsion has a variation coefficient of not more than 0.10.
Claim 14
Dependent Claim
27 words
The negative-working photographic light-sensitive material of claim 1, wherein the crystal form of the grains contained in said silver halide emulsion is a cube or a tetradecahedron.
Claim 15
Dependent Claim
18 words
The negative-working photographic light-sensitive material of claim 1, wherein said silver halide emulsion contains a pyrazotriazole type coupler.
Claim 16
Dependent Claim
19 words
The negative-working photographic light-sensitive material of claim 14, wherein said silver halide emulsion contains a pyrazolo[1,5-b][1,2,4]triazole or a imidazo[1,2-b]pyrazole.
Claim 17
Dependent Claim
20 words
The negative-working photographic light-sensitive material of claim 1, wherein said silver halide emulsion is spectrally sensitized by a sensitizing dye.
Claim 18
Dependent Claim
60 words
The negative-working photographic light-sensitive material of claim 16, wherein the sensitizing dye is added in the step selected from (1) during the formation of the silver halide grains, (2) during the physical ripening, or at the stage after physical ripening to before chmical sensitization, or (3) during the chemical sensitization, or at the stage after chemical sensitization to before coating.
Claim 19
Dependent Claim
29 words
The negative-working photographic light-sensitive material of claim 17, wherein the sensitizing dye is added during the physical ripening, or at the stage after physical ripening to before chemical sensitization.
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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) | 1992-02-07 | 1992-08-08 | 1993-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-07 | 1996-08-08 | 1997-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-07 | 2000-08-08 | 2001-02-07 | $7700.00 | Window Closed / Lapsed |