US4720452A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light-sensitive silver halide photographic material
Assignee: Konica Minolta Inc
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Filing: 1986-08-07
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Granted: 1988-01-19
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Expires: 2006-08-07
Abstract
Abstract A light-sensitive silver halide photographic material having silver halide emulsion layers on a support, wherein at least one layer of said silver halide emulsion layers contains surface latent image type mono-dispersed silver halide grains, and 50% or more of the silver halide grains contained in said at least one silver halide emulsion layer are regular surface latent image type mono-dispersed silver halide grains of tetradecahedral crystals whose external surfaces have crystal faces with Miller indices (100) and (111), the area ratio of said (100) face and said (111) face satisfying the relation represented by the correlation formula (I) shown below: correlation formula (I): ##EQU1## wherein K is the ratio between the intensities of respective diffraction lines attributable to the (200) face and the (222) face measured in X-ray diffraction analysis as set forth in the following formula ##EQU2##
Inventors
- 👤 Hideki Takiguchi
- 👤 Toshifumi Iijima
- 👤 Toshihiko Yagi
- 👤 Yoshihiro Haga
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:58
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035; G03C2001/03558; G03C2001/0357
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
176 words
A light-sensitive silver halide photographic material having silver halide emulsion layers on a support, wherein at least one layer of said silver halide emulsion layers contains surface latent image-forming mono-dispersed silver halide grains, and 50% or more of the silver halide grains contained in said at least one silver halide emulsion layer are core-shell silver halide grains containing cores comprising a silver halide containing silver iodide and shells comprising primarily silver bromide covering said cores and are the surface latent image-forming mono-dispersed silver halide grains of tetradecahedral regular crystals whose external surfaces have crystal faces (100) and (111), the area ratio of said (100) face and said (111) face represented by: ##EQU12## and satisfying the following formula: ##EQU13## wherein K is the ratio between the intensities of respective diffraction lines attributable to the (200) face at 30.9° of the diffraction angle which corresponds to the (100) face and the (222) face at 55° of the diffraction angle which corresponds to the (111) face measured in X-ray diffraction analysis as set forth in the following formula ##EQU14##
Claim 2
Dependent Claim
176 words
A light-sensitive silver halide photographic material having silver halide emulsion layers on a support, wherein at least one layer of said silver halide emulsion layers contains surface latent image-forming mono-dispersed silver halide grains, and 50% or more of the silver halide grains contained in said at least one silver halide emulsion layer are core-shell silver halide grains containing cores comprising a silver halide containing silver iodide and shells comprising primarily silver bromide covering said cores and are the surface latent image-forming mono-dispersed silver halide grains of tetradecahedral regular crystals whose external surfaces have crystal faces (100) and (111), the area ratio of said (100) face and said (111) face represented by: ##EQU12## and satisfying the following formula: ##EQU13## wherein K is the ratio between the intensities of respective diffraction lines attributable to the (200) face at 30.9° of the diffraction angle which corresponds to the (100) face and the (222) face at 55° of the diffraction angle which corresponds to the (111) face measured in X-ray diffraction analysis as set forth in the following formula ##EQU14##
Claim 3
Dependent Claim
73 words
The light-sensitive silver halide photographic material according to claim 1, wherein the mono-dispersed silver halide grains which have uniform shapes of individual silver halide grains, have regular substantially uniformly and evenly arranged grain sizes, and have a grain size distribution as defined by the following formula: ##EQU15## wherein S is the standard deviation S, r is the mean grain size, ri represents the individual grain sizes and their numbers are represented by ni.
Claim 4
Dependent Claim
23 words
The light-sensitive silver halide photographic material according to claim 1, wherein said silver halide grains consist essentially of core-shell type silver halide grains.
Claim 5
Dependent Claim
27 words
The light-sensitive silver halide photographic material according to claim 1, wherein said silver halide grains comprise silver iodide at a level of 3 to 12 mole %.
Claim 6
Dependent Claim
27 words
The light-sensitive silver halide photographic material according to claim 4, wherein said silver halide grains comprise silver iodide at a level of 5 to 10 mole %.
Claim 7
Dependent Claim
26 words
The light-sensitive silver halide photographic material according to claim 3, wherein said core-shell type silver halide grains comprise shells having a thickness of 0.001 to 0.1μ.
Claim 8
Dependent Claim
44 words
The light-sensitive silver halide photographic material according to claim 2, wherein said silver halide grains consist essentially of core-shell type silver halide grains which consist essentially of cores comprising a silver halide containing silver iodide and shells comprising primarily silver bromide covering said cores.
Claim 9
Dependent Claim
26 words
The light-sensitive silver halide photographic material according to claim 7, wherein said core-shell type silver halide grains comprise shells having a thickness of 0.001 to 0.1μ.
Claim 10
Dependent Claim
27 words
The light-sensitive silver halide photographic material according to claim 8, wherein said silver halide grains comprise silver iodide at a level of 5 to 10 mole %.
Claim 11
Dependent Claim
27 words
The light-sensitive silver halide photographic material according to claim 7, wherein said silver halide grains comprise silver iodide at a level of 5 to 10 mole %.
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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) | 1991-01-18 | 1991-07-20 | 1992-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-01-18 | 1995-07-20 | 1996-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-01-18 | 1999-07-20 | 2000-01-19 | $7700.00 | Window Closed / Lapsed |