US4539289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide light-sensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1984-03-02
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Granted: 1985-09-03
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Expires: 2004-03-02
Abstract
Abstract A silver halide light-sensitive material is disclosed. The material is comprised of a support comprising thereon at least two emulsion layers having the same color sensitivity and being different light-sensitivities, with a layer containing comparatively light-insensitive silver halide grains of 0.05 to 0.6 μm in average grain size being positioned in at least one of interspaces defined by every two adjacent members of said at least two emulsion layers. The resulting material has both raised sensitivity and improved graininess.
Inventors
- 👤 Tsutomu Saito
- 👤 Keiji Mihayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 19:48
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/46; G03C7/00; G03C7/30; G03C7/3029; G03C2007/3034
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
95 words
A silver halide light-sensitive material comprising a support comprising thereon (1) at least two emulsion layers having the same color sensitivity and being different in sensitivity, and (2) an intermediate layer sandwiched between said at least two emulsion layers, said intermediate layer containing comparatively light-insensitive silver halide grains of 0.05 to 0.6 μm in average grain size and wherein said intermediate layer does not contain couplers and has a sensitivity lower than the least sensitive layer of the two light-sensitive silver halide emulsion layers of the same color sensitivity by 0.5 or more log units.
Claim 2
Dependent Claim
95 words
A silver halide light-sensitive material comprising a support comprising thereon (1) at least two emulsion layers having the same color sensitivity and being different in sensitivity, and (2) an intermediate layer sandwiched between said at least two emulsion layers, said intermediate layer containing comparatively light-insensitive silver halide grains of 0.05 to 0.6 μm in average grain size and wherein said intermediate layer does not contain couplers and has a sensitivity lower than the least sensitive layer of the two light-sensitive silver halide emulsion layers of the same color sensitivity by 0.5 or more log units.
Claim 3
Dependent Claim
50 words
A silver halide light-sensitive material as claimed in claim 1, wherein the layer containing comparatively light-insensitive silver halide grains has a sensitivity lower than the least sensitive layer of at least two light sensitive silver halide emulsion layers of the same color sensitivity by 1.0 or more in log units.
Claim 4
Dependent Claim
41 words
A silver halide light-sensitive material as claimed in claim 1, wherein the layer containing comparatively light-insensitive silver halide grains is comprised of an emulsion containing 60% or more silver bromide, 30% or less silver chloride, and 40% or less silver iodide.
Claim 5
Dependent Claim
27 words
A silver halide light-sensitive material as claimed in claim 1, wherein the light-insensitive silver halide grains have a size in the range of 0.08 to 0.4 μm.
Claim 6
Dependent Claim
40 words
A silver halide light-sensitive material as claimed in claim 1, wherein said at least two emulsion layers are blue-sensitive emulsion layers and the light-insensitive layer includes silver halide grains having a size in the range of 0.08 to 0.25 μm.
Claim 7
Dependent Claim
40 words
A silver halide light-sensitive material as claimed in claim 1, wherein said at least two emulsion layers are green-sensitive silver halide emulsion layers and the light-insensitive silver halide grains have a size in the range of 0.1 to 0.3 μm.
Claim 8
Dependent Claim
40 words
A silver halide light-sensitive material as claimed in claim 1, wherein said at least two emulsion layers are red-sensitive silver halide emulsion layers and the light-insensitive silver halide grains have a size in the range of 0.1 to 0.4 μm.
Claim 9
Dependent Claim
39 words
A silver halide light-sensitive material as claimed in claim 1, wherein the layer containing comparatively light-insensitive silver halide grains is present in an amount in the range of 0.03 to 5 g/m 2 based on the amount of silver.
Claim 10
Dependent Claim
39 words
A silver halide light-sensitive material as claimed in claim 8, wherein the layer containing comparatively light-insensitive silver halide grains is present in an amount in the range of 0.05 to 1 g/m 2 based on the amount of silver.
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) | 1988-09-02 | 1989-03-04 | 1989-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-09-02 | 1993-03-04 | 1993-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-09-02 | 1997-03-04 | 1997-09-03 | $7700.00 | Window Closed / Lapsed |