US4565778A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic materials
Assignee: Konica Minolta Inc
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Filing: 1984-03-26
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Granted: 1986-01-21
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Expires: 2004-03-26
Abstract
Abstract Silver halide photographic materials with higher sensitivity and less fogging having at least one silver halide emulsion layer over a photographic base or support wherein the emulsion of said emulsion layer substantially contains core/shell-type silver halide grains or core/shell-type monodisperse silver halide grains, core portion of said grain containing silver iodide in a greater amount than that contained in shell portion of said grain and said emulsion is subjected to chemical ripening in the presence of a labile selenium compound, optionally with coexistence of a silver halide solvent, and said emulsion may contain further a specific phenol compound.
Inventors
- 👤 Akihiko Miyamoto
- 👤 Hideki Takiguchi
- 👤 Shoji Matsuzaka
- 👤 Hiroshi Kashiwagi
- 👤 Yoshiyuki Nonaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:53
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/035; G03C2001/03535; G03C2001/03558; G03C2001/0357; G03C2200/00; G03C2200/06
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
69 words
A silver halide photographic material having at least one silver halide emulsion layer on a support characterized in that an emulsion of said emulsion layer substantially contains core/shell silver halide grains, the core portion of said grain containing silver iodide in a greater amount than the shell portion of said grain, and said emulsion has been subjected to chemical ripening in the presence of a labile selenium compound sensitizer.
Claim 2
Dependent Claim
69 words
A silver halide photographic material having at least one silver halide emulsion layer on a support characterized in that an emulsion of said emulsion layer substantially contains core/shell silver halide grains, the core portion of said grain containing silver iodide in a greater amount than the shell portion of said grain, and said emulsion has been subjected to chemical ripening in the presence of a labile selenium compound sensitizer.
Claim 3
Dependent Claim
21 words
A silver halide photographic material according to claim 1 wherein said core/shell silver halide grains are core/shell monodisperse silver halide grains.
Claim 4
Dependent Claim
29 words
A silver halide photographic material according to claim 1 wherein said chemical ripening is effected in the presence of said labile selenium compound sensitizer and a silver halide solvent.
Claim 5
Dependent Claim
104 words
A silver halide photographic material according to claim 1 wherein said emulsion further contains at least one of phenol compounds having the formula ##STR5## wherein R 1 , R 2 , R 3 , R 4 and R 5 individually represent a hydrogen atom, a halogen atom, a hydroxy group, an alkoxy group, an amino group, an acylamino group, an acyloxy group, a carboxyl group, an alkoxycarbonyl group, an alkoxycarbonylamino group, an aryl group, a sulfo group, a cyano group, an alkyl group or a sulfamoyl group or wherein any two adjacent groups of said R 5 are linked together to form a ring.
Claim 6
Dependent Claim
43 words
A silver halide photographic material according to claim 1 wherein said core portion comprises a silver halide containing silver iodide at 1 to 15 molar % and said shell portion comprises a silver halide containing silver iodide at 0 to 5 molar %.
Claim 7
Dependent Claim
23 words
A silver halide photographic material according to claim 1 wherein said shell portion of grain has a thickness of 0.01 to 0.3 μm.
Claim 8
Dependent Claim
22 words
A silver halide photographic material according to claim 1 wherein said core/shell silver halide grain is of a octahedral or tetrahedral shape.
Claim 9
Dependent Claim
23 words
A silver halide photographic material according to claim 1 wherein all grains in the emulsion of said emulsion layer are of a core/shell.
Claim 10
Dependent Claim
36 words
A silver halide photographic material according to claim 1 wherein said labile selenium compound sensitizer is selected from a colloidal selenium metal, an aliphatic isoselenocyanate, an aliphatic selenourea, a selenoketone, a selenoamide and a selenocarboxylic acid.
Claim 11
Dependent Claim
32 words
A silver halide photographic material according to claim 1 wherein said labile selenium compound sensitizer is employed in an amount of 1.0×10 -4 to 5 mg per mole of a silver halide.
Claim 12
Dependent Claim
44 words
A silver halide photographic material according to claim 3 wherein said silver halide solvent is selected from an organic thioether, a thiourea derivative, an imidazole having a thiocarbonyl group between an oxygen or sulfur atom and a nitrogen atom, a sulfite and a thiocyanate.
Claim 13
Dependent Claim
21 words
A silver halide photographic material according to claim 3 wherein said silver halide solvent is selected from the following compounds; ##STR6##
Claim 14
Dependent Claim
26 words
A silver halide photographic material according to claim 4 wherein said phenol compound is added at 10 -7 to 10 -1 mole per mole of silver.
Claim 15
Dependent Claim
20 words
A silver halide photographic material according to claim 4 wherein said phenol compound is selected from the following compounds; ##STR7##
Claim 16
Dependent Claim
43 words
A silver halide photographic material according to claim 1 wherein said silver halide grains are core/shell silver iodobromide grains containing silver iodide and having a thickness of said shell portion of 0.01 to 0.3 μm and said labile selenium compound sensitizer is N,N-dimethylselenourea.
Claim 17
Dependent Claim
19 words
A silver halide photographic material according to claim 1, wherein said emulsion has further been subjected to sulfur sensitization.
Claim 18
Dependent Claim
20 words
A silver halide photographic material according to claim 1, wherein said emulsion according to claim 16 is a monodispersed emulsion.
Claim 19
Dependent Claim
17 words
A silver halide photographic material according to claim 16, said shell portion consists essentially of silver bromide.
Claim 20
Dependent Claim
31 words
A silver halide photographic material according to claim 16, said shell portion consists of 0 to 1 mole % of silver iodide and 99 to 100 mole % of silver bromide.
Claim 21
Dependent Claim
32 words
A silver halide photographic material according to claim 18, wherein said shell portion consists of 0 to 0.5 mole % of silver iodide and 99.5 to 100 mole % of silver bromide.
Claim 22
Dependent Claim
18 words
A silver halide photographic material according to claim 16, wherein said core portion comprises two or more layers.
Claim 23
Dependent Claim
29 words
A silver halide photographic material according to claim 18, wherein said core portion consists of a silver halide containing 2 to 15 mole % on average of silver iodide.
Claim 24
Dependent Claim
27 words
A silver halide photographic material according to claim 16, wherein the average content of silver iodide in said silver halide grains is 0.5 to 15 mole %.
Claim 25
Dependent Claim
27 words
A silver halide photographic material according to claim 23, wherein the average content of silver iodide in said silver halide grains is 5 to 12 mole %.
Claim 26
Dependent Claim
18 words
A silver halide photographic material according to claim 1, wherein said emulsion contains further a nitrogen-containing heterocyclic compound.
Claim 27
Dependent Claim
15 words
A silver halide photographic material according to claim 25, wherein said heterocyclic compound is 4-hydroxy-6-methyl-1,3,3a,7-tetrazaindene.
Claim 28
Dependent Claim
18 words
A silver halide photographic material according to claim 16, wherein said emulsion contains further a nitrogen-containing heterocyclic compound.
Claim 29
Dependent Claim
15 words
A silver halide photographic material according to claim 27, wherein said heterocyclic compound is 4-hydroxy-6-methyl-1,3,3a,7-tetrazaindene.
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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) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |