US4727016A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic light sensitive material having different sized silver halide emulsions in the same layer
Assignee: Fujifilm Holdings Corp
•
Filing: 1985-11-14
•
Granted: 1988-02-23
•
Expires: 2005-11-14
Abstract
Abstract A photographic light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer is disclosed, which contains in said silver halide emulsion layer two silver halide emulsions which are different from each other in mean grain size and which satisfy the conditions that: one of the silver halide emulsions, having a relatively larger mean grain size, has a mean grain size (X 1 ) of 1.3 μm or more; the mean grain size (X 2 ) of the other silver halide emulsion, having a relatively smaller mean grain size, and X 1 has a relation satisfying Formula (1) Formula (1): 0.5≦X.sub.2 /X.sub.1 ≦0.9; the ratio of the standard deviation (S 1 ) of the grain sizes of the silver halide emulsion having a relatively larger mean grain size to X 1 satisfies the Formula (2) Formula (2): S.sub.1 /X.sub.1 ≦0.25; the ratio of the standard deviation (S 2 ) of the grain sizes of the silver halide emulsion having a relatively smaller mean grain size to X 2 satisfies Formula (3) Formula (3): 0.2<S.sub.2 /X.sub.2 ; and the two ratios of standard deviation of grain sizes of silver halide emulsion to mean grain size satisfy Formula (4) Formula (4): S.sub.1 /X.sub.1 <S.sub.2 /X.sub.2.
Inventors
- 👤 Shinsuke Bando
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:10
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3022; G03C1/00; G03C1/005; G03C1/035; G03C2001/03564
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
208 words
A silver halide photographic light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer, which contains in said silver halide emulsion layer two silver halide emulsions which are different from each other in mean grain size and which satisfy the conditions that: one of the silver halide emulsions, having a relatively larger mean grain size, has a mean grain size (X 1 ) of not less than 1.3 μm; the mean grain size (X 2 ) of the other silver halide emulsion, having a relatively smaller mean grain size, and X 1 have a relation satisfying Formula (1) Formula (1): 0.5≦X.sub.2 /X.sub.1 ≦0.9; the ratio of the standard deviation (S 1 ) of the grain sizes of the silver halide emulsion having a relatively larger mean grain size to X 1 satisfies Formula (2) Formula (2): S.sub.1 /X.sub.1 ≦0.25 ; the ratio of the standard deviation (S 2 ) of the grain sizes of the silver halide emulsion having a relatively smaller mean grain size to X 2 satisfies Formula (3) Formula (3): 0.2<S.sub.2 /X.sub.2 ; and the two ratios of standard deviation of grain sizes of silver halide emulsion to mean grain size satisfy Formula (4) Formula (4): S.sub.1 /X.sub.1 <S.sub.2 /X.sub.2.
Claim 2
Dependent Claim
208 words
A silver halide photographic light-sensitive material comprising a support having provided thereon at least one silver halide emulsion layer, which contains in said silver halide emulsion layer two silver halide emulsions which are different from each other in mean grain size and which satisfy the conditions that: one of the silver halide emulsions, having a relatively larger mean grain size, has a mean grain size (X 1 ) of not less than 1.3 μm; the mean grain size (X 2 ) of the other silver halide emulsion, having a relatively smaller mean grain size, and X 1 have a relation satisfying Formula (1) Formula (1): 0.5≦X.sub.2 /X.sub.1 ≦0.9; the ratio of the standard deviation (S 1 ) of the grain sizes of the silver halide emulsion having a relatively larger mean grain size to X 1 satisfies Formula (2) Formula (2): S.sub.1 /X.sub.1 ≦0.25 ; the ratio of the standard deviation (S 2 ) of the grain sizes of the silver halide emulsion having a relatively smaller mean grain size to X 2 satisfies Formula (3) Formula (3): 0.2<S.sub.2 /X.sub.2 ; and the two ratios of standard deviation of grain sizes of silver halide emulsion to mean grain size satisfy Formula (4) Formula (4): S.sub.1 /X.sub.1 <S.sub.2 /X.sub.2.
Claim 3
Dependent Claim
20 words
A silver halide photographic light-sensitive material as in claim 1, wherein X 1 is from 1.3 μm to 4.0 μm.
Claim 4
Dependent Claim
21 words
A silver halide photographic light-sensitive material as in claim 1, wherein X 2 /X 1 satisfies the formula 0.6≦X.sub.2 /X.sub.1 ≦0.8.
Claim 5
Dependent Claim
21 words
A silver halide photographic light-sensitive material as in claim 1, wherein S 1 /X 1 satisfies the formula 0.15≦S.sub.1 /X.sub.1 ≦0.25.
Claim 6
Dependent Claim
21 words
A silver halide photographic light-sensitive material as in claim 1, wherein S 2 /X 2 satisfies the formula 0.20<S.sub.2 /X.sub.2 ≦0.40.
Claim 7
Dependent Claim
31 words
A silver halide photographic light-sensitive material as in claim 1, wherein S 1 /X 1 and S 2 /X 2 have a relation satisfying the formula S.sub.2 /X.sub.2 -S.sub.1 /X.sub.1 ≧0.05.
Claim 8
Dependent Claim
42 words
A silver halide photographic light-sensitive material as in claim 1, wherein the weight ratio of the silver halide emulsion having a mean grain size of X 1 to that having a mean grain size of X 2 is from 1/9 to 9/1.
Claim 9
Dependent Claim
17 words
A silver halide photographic light-sensitive material as in claim 1, wherein the silver halide is silver bromoiodide.
Claim 10
Dependent Claim
26 words
A silver halide photographic light-sensitive material as in claim 1, wherein the silver halide is silver bromoiodide containing from 2 to 30 mol% of silver iodide.
Claim 11
Dependent Claim
18 words
A silver halide photographic light-sensitive material as in claim 1, wherein the material is a color photographic material.
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) | 1991-02-22 | 1991-08-24 | 1992-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-22 | 1995-08-24 | 1996-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-22 | 1999-08-24 | 2000-02-23 | $7700.00 | Window Closed / Lapsed |