US4581327A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic material
Assignee: Konica Minolta Inc
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Filing: 1984-05-15
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Granted: 1986-04-08
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Expires: 2004-05-15
Abstract
Abstract A silver halide photographic material having, in a hydrophilic colloid layer, silver halide grains of a dual structure with core and shell which have been ripened without fogging is disclosed. The outermost shell portion of each of the grains has a silver halide composition such that it contains a rhodium atom and at least 80 mol % of silver chloride. The contents of silver chloride and rhodium in the outermost shell portion of each grain are greater than those for the core.
Inventors
- 👤 Takeshi Habu
- 👤 Akira Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035; G03C2001/03535; G03C2200/00; G03C2200/06
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
81 words
A silver halide photographic material having, in a hydrophilic colloid layer, silver halide grains of a dual structure with core and shell which have been ripened without fogging, wherein the outermost shell portion of each of said grains has such a silver halide composition that it contains a rhodium atom and at least 80 mol % of silver chloride, the contents of silver chloride and rhodium in the outermost shell portion of each grain being greater than those for the core.
Claim 2
Dependent Claim
81 words
A silver halide photographic material having, in a hydrophilic colloid layer, silver halide grains of a dual structure with core and shell which have been ripened without fogging, wherein the outermost shell portion of each of said grains has such a silver halide composition that it contains a rhodium atom and at least 80 mol % of silver chloride, the contents of silver chloride and rhodium in the outermost shell portion of each grain being greater than those for the core.
Claim 3
Dependent Claim
22 words
A silver halide photographic material according to claim 1, wherein said shell is made of silver chlorobromide, silver chloroiodobromide or silver chloride.
Claim 4
Dependent Claim
26 words
A silver halide photographic material according to claim 1, wherein said core and shell have a silver iodide content of not more than 5 mol %.
Claim 5
Dependent Claim
26 words
A silver halide photographic material according to claim 3, wherein said core and shell have a silver iodide content of not more than 2 mol %.
Claim 6
Dependent Claim
22 words
A silver halide photographic material according to claim 1, wherein said core is made of silver bromide, silver chlorobromide or silver chloroiodobromide.
Claim 7
Dependent Claim
27 words
A silver halide photographic material according to claim 1, wherein said shell contains 1×10 -9 to 1×10 -4 mol of rhodium atom per mol of silver halide.
Claim 8
Dependent Claim
22 words
A silver halide photographic material according to claim 1, wherein said core has an average grain size of 0.02 to 1.0 μm.
Claim 9
Dependent Claim
22 words
A silver halide photographic material according to claim 7, wherein said core has an average grain size of 0.05 to 0.6 μm.
Claim 10
Dependent Claim
26 words
A silver halide photographic material according to claim 1, wherein said silver halide grains of dual structure have an average size of 0.05 to 1.5 μm.
Claim 11
Dependent Claim
26 words
A silver halide photographic material according to claim 9, wherein said silver halide grains of dual structure have an average size of 0.1 to 0.8 μm.
Claim 12
Dependent Claim
26 words
A silver halide photographic material according to claim 1, wherein the volume ratio of said core to shell is in the range of 1:100 to 100:1.
Claim 13
Dependent Claim
21 words
A silver halide photographic material according to claim 11, wherein said volume ratio is in the range of 1:10 to 10:1.
References Cited (Backward Citations)
US3488709A
Cited
US4070190A
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US4269927A
Cited
US4346167A
Cited
US4444877A
Cited
US4452882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-04-07 | 1989-10-07 | 1990-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-04-07 | 1993-10-07 | 1994-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-04-07 | 1997-10-07 | 1998-04-08 | $7700.00 | Window Closed / Lapsed |