US4751174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic material with light-insensitive silver halide emulsion layer
Assignee: Fujifilm Holdings Corp
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Filing: 1986-10-16
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Granted: 1988-06-14
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Expires: 2006-10-16
Abstract
Abstract A silver halide photographic material is disclosed, comprising a support having provided thereon at least one light-sensitive silver halide emulsion layer and at least one substantially light-insensitive silver halide emulsion layer, wherein the substantially light-insensitive silver halide emulsion layer is present between a layer exhibiting the highest sensitivity among the light-sensitive silver halide emulsion layers and the support. This material is decreased in halation and cross-over light, and is excellent in sharpness.
Inventors
- 👤 Ichizo Toya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:38
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/8255; Y; Y10; Y10S; Y10S430/00; Y10S430/167
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
54 words
A black-and-white silver halide photographic material comprising a support having provided thereon at least one light-sensitive silver halide emulsion layer, and at least one substantially light-insensitive silver halide emulsion layer, wherein the substantially light-insensitive silver halide emulsion layer is located nearer to the support than any of the light sensitive silver halide emulsions layers.
Claim 2
Dependent Claim
54 words
A black-and-white silver halide photographic material comprising a support having provided thereon at least one light-sensitive silver halide emulsion layer, and at least one substantially light-insensitive silver halide emulsion layer, wherein the substantially light-insensitive silver halide emulsion layer is located nearer to the support than any of the light sensitive silver halide emulsions layers.
Claim 3
Dependent Claim
42 words
A silver halide photographic material as in claim 1, wherein the sensitivity of the substantially light-insensitive silver halide emulsion layer is not more than 1/1,000th of the sensitivity of the layer having the highest sensitivity among the light-sensitive silver halide emulsion layers.
Claim 4
Dependent Claim
57 words
A silver halide photographic material as in claim 1, wherein the amount of silver coated in the substantially light-insensitive silver halide emulsion layer is from 0.01 to 5 g/m 2 , and the amount of silver coated in the light-sensitive silver halide emulsion layer which substantially has the sensitivity is from 0.1 to 15 g/m 2 .
Claim 5
Dependent Claim
57 words
A silver halide photographic material as in claim 2, wherein the amount of silver coated in the substantially light-insensitive silver halide emulsion layer is from 0.01 to 5 g/m 2 , and the amount of silver coated in the light-sensitive silver halide emulsion layer which substantially has the sensitivity is from 0.1 to 15 g/m 2 .
Claim 6
Dependent Claim
57 words
A silver halide photographic material as in claim 1, wherein the amount of silver coated in the substantially light-insensitive silver halide emulsion layer is from 0.1 to 3 g/m 2 , and the amount of silver coated in the light-sensitive silver halide emulsion layer which substantially has the sensitivity is from 0.5 to 10 g/m 2 .
Claim 7
Dependent Claim
57 words
A silver halide photographic material as in claim 2, wherein the amount of silver coated in the substantially light-insensitive silver halide emulsion layer is from 0.1 to 3 g/m 2 , and the amount of silver coated in the light-sensitive silver halide emulsion layer which substantially has the sensitivity is from 0.5 to 10 g/m 2 .
Claim 8
Dependent Claim
36 words
A silver halide photographic material as in claim 1, wherein photographic emulsions for forming the light-sensitive silver halide emulsion layer or the substantially light-insensitive silver halide emulsion layer are subjected to spectral sensitization using methine dyes.
Claim 9
Dependent Claim
32 words
A silver halide photographic material as in claim 7, wherein a difference between absorption maximums due to the dyes in the light-sensitive emulsions and the substantially light-insensitive emulsions is within 20 nm.
References Cited (Backward Citations)
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Cited
US4130428A
Cited
US4462226A
Cited
US4347301A
Cited
US4513079A
Cited
US4543323A
Cited
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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) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |