US4481288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive silver halide photographic material
Assignee: Konica Minolta Inc
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Filing: 1983-10-14
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Granted: 1984-11-06
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Expires: 2003-10-14
Abstract
Abstract There is disclosed a light-sensitive silver halide photographic material having at least one silver halide emulsion layer constituted of a plural number of layers which are substantially the same in color to which they are sensitive but different in sensitivity provided on a support, which comprises a layer having the highest sensitivity among the plural number of layers with different sensitivities which contains at least two kinds of substantially mono-dispersed silver halide grains with different average grain sizes. The light-sensitive silver halide photographic material according to this invention is high in sensitivity and excellent in graininess of dye image.
Inventors
- 👤 Yoshitaka Yamada
- 👤 Toshifumi Iijima
- 👤 Toshihiko Yagi
- 👤 Yoshihiro Haga
- 👤 Kenji Kumashiro
- 👤 Hiroshi Menjo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:16
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/3022; G03C1/00; G03C1/005; G03C1/46
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
140 words
A light-sensitive silver halide photographic material having at least one silver halide emulsion layer constituted of a plural number of layers which are substantially the same in color to which they are sensitive but different in sensitivity provided on a support, which comprises a layer having the highest sensitivity among the plural number of layers with different sensitivities which contains at least two kinds of substantially mono-dispersed silver halide grains with different average grain sizes, the average grain size (X 1 ) of the mono-dispersed silver halide grains having the largest average grain size and the average grain size (X 2 ) of the mono-dispersed silver halide grains having the second largest average grain size among the mono-dispersed silver halide grains with different average grain sizes satisfying the correlation formula (I) shown below: Correlation formula (I): 0.1≦log (X.sub.1 /X.sub.2).sup.2 ≦0.6.
Claim 2
Dependent Claim
140 words
A light-sensitive silver halide photographic material having at least one silver halide emulsion layer constituted of a plural number of layers which are substantially the same in color to which they are sensitive but different in sensitivity provided on a support, which comprises a layer having the highest sensitivity among the plural number of layers with different sensitivities which contains at least two kinds of substantially mono-dispersed silver halide grains with different average grain sizes, the average grain size (X 1 ) of the mono-dispersed silver halide grains having the largest average grain size and the average grain size (X 2 ) of the mono-dispersed silver halide grains having the second largest average grain size among the mono-dispersed silver halide grains with different average grain sizes satisfying the correlation formula (I) shown below: Correlation formula (I): 0.1≦log (X.sub.1 /X.sub.2).sup.2 ≦0.6.
Claim 3
Dependent Claim
36 words
A light-sensitive silver halide photographic material according to claim 1, wherein a broadness of distribution of the silver halide grains being 20% or less when the broadness of distribution is defined by the following formula: ##EQU2##
Claim 4
Dependent Claim
24 words
A light-sensitive silver halide photographic material according to claim 2, wherein a broadness of distribution of the silver halide grains being 15% or less.
Claim 5
Dependent Claim
40 words
A light-sensitive silver halide photographic material according to claim 1, wherein said average grain size of X 1 being 0.4μ to 2.0μ, and said average grain size of X 2 is within the range represented by the correlation formula (I).
Claim 6
Dependent Claim
29 words
A light-sensitive silver halide photographic material according to claim 1, wherein said average grain sizes of X 1 and X 2 being the range of 0.15≦log (X.sub.1 /X.sub.2).sup.2 ≦0.4.
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) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |