US5213951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic material with reduced sensitizing dye stain
Assignee: Carestream Health Inc
•
Filing: 1991-07-12
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Granted: 1993-05-25
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Expires: 2011-07-12
Abstract
Abstract A silver halide photographic material having at least one silver halide light-sensitive emulsion layer on at least one side of a support, wherein said silver halide emulsion layer comprises tabular silver halide grains having a grain thickness of 0.3 μm or less and accounting for at least 50% of the total projected area, wherein a blue pigment having a maximum absorption wave length of from 570 to 630 nm is present in said silver halide emulsion layer and/or in another hydrophilic layer of the photographic material.
Inventors
- 👤 Gerolamo Delfino
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 19:59
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/833; G03C1/005; G03C1/0051; G03C5/00; G03C5/16; G03C5/17; Y; Y10; Y10S; Y10S430/00; Y10S430/167
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
86 words
A silver halide photographic material having at least one silver halide light-sensitive emulsion layer on at least one side of a support, wherein said silver halide emulsion layer comprises tabular silver halide grains having a grain thickness of 0.3 μm or less and accounting for at least 50% of the total projected area, characterized in that a blue pigment having a maximum absorption wavelength of from 570 to 630 nm is present in said silver halide emulsion layer and/or another hydrophilic layer of said photographic material.
Claim 2
Dependent Claim
86 words
A silver halide photographic material having at least one silver halide light-sensitive emulsion layer on at least one side of a support, wherein said silver halide emulsion layer comprises tabular silver halide grains having a grain thickness of 0.3 μm or less and accounting for at least 50% of the total projected area, characterized in that a blue pigment having a maximum absorption wavelength of from 570 to 630 nm is present in said silver halide emulsion layer and/or another hydrophilic layer of said photographic material.
Claim 3
Dependent Claim
27 words
A silver halide photographic material according to claim 1, characterized in that said blue pigment has a maximum absorption wave length of from 580 to 620 nm.
Claim 4
Dependent Claim
27 words
A silver halide photographic material according to claim 1, characterized in that said blue pigment has a maximum absorption wave length of from 590 to 610 nm.
Claim 5
Dependent Claim
23 words
A silver halide photographic material according to claim 1, characterized in that said blue pigment is selected from the group of phthalocyanine pigments.
Claim 6
Dependent Claim
28 words
A silver halide photographic material according to claim 4, wherein said blue pigment has the following formula: ##STR4## wherein R independently may be H or any insolubilizing group.
Claim 7
Dependent Claim
24 words
A silver halide photographic material according to claim 1, characterized in that said blue pigment is selected from the group of metal phthalocyanine pigments.
Claim 8
Dependent Claim
35 words
A silver halide photographic material according to claim 6, wherein said blue pigment has the following formula: ##STR5## wherein R independently may be H or any insolubilizing group and Me is a divalent metallic atom.
Claim 9
Dependent Claim
47 words
A silver halide photographic material according to claim 7 characterized in that said insolubilizing group is selected from straight or branched alkyl, cyclic alkyl, aryl, alkoxy, aryloxy, alkylaryl, alkoxyaryl, aralkyl, each of them substituted or unsubstituted, ester group, halides, --NO 2 , --SO 3 Ba 178 .
Claim 10
Dependent Claim
28 words
A silver halide photographic material according to claims 7 characterized in that said divalent metallic atom is selected from Cu, Co, Mn, Sn, Pb, Ni, Zn, Fe, Mg.
Claim 11
Dependent Claim
25 words
A silver halide photographic material according to claim 1, characterized in that said blue pigment is added to a silver halide light sensitive emulsion layer.
Claim 12
Dependent Claim
22 words
A silver halide photographic material according to claim 1, characterized in that said blue pigment is added to a hydrophilic colloid layer.
Claim 13
Dependent Claim
20 words
A silver halide photographic material according to claim 11, characterized in that said hydrophilic colloid layer is a protective layer.
Claim 14
Dependent Claim
28 words
A silver halide photographic material according to claim 1 characterized in that said blue pigment is added in an amount of from 0.001 to 0.5 g/m 2 .
Claim 15
Dependent Claim
48 words
A silver halide photographic material according to claim 1 characterized in that said blue pigment is added in an amount so that the optical density, measured at 632 nm, of the layer containing said pigment is in the range of from 0.01 to 0.1, after the developing treatment.
Claim 16
Dependent Claim
48 words
A silver halide photographic material according to claim 1 characterized in that said blue pigment is added in an amount so that the optical density, measured at 632 nm, of the layer containing said pigment is in the range of from 0.02 to 0.05, after the developing treatment.
Claim 17
Dependent Claim
30 words
A silver halide photographic material according to claim 1 characterized in that the average diameter to thickness ratio of said tabular silver halide grains is of from 5 to 50.
Claim 18
Dependent Claim
88 words
A silver halide photographic material having at least one silver halide light-sensitive emulsion layer on at least one side of a support, wherein said silver halide emulsion layer comprises tabular silver halide grains having a grain thickness of 0.3 μm or less and accounting for at least 50% of the total projected area, characterized in that a blue pigment having a maximum absorption wavelength of from 580 to 620 nm is present in a hydrophilic layer of said photographic material which is not a silver halide emulsion layer.
Claim 19
Dependent Claim
88 words
A silver halide photographic material having at least one silver halide light-sensitive emulsion layer on at least one side of a support, wherein said silver halide emulsion layer comprises tabular silver halide grains having a grain thickness of 0.3 μm or less and accounting for at least 50% of the total projected area, characterized in that a blue pigment having a maximum absorption wavelength of from 580 to 620 nm is present in a hydrophilic layer of said photographic material which is not a silver halide emulsion layer.
Claim 20
Dependent Claim
23 words
A silver halide photographic material according to claim 17, characterized in that said blue pigment is selected from the group of phthalocyanine pigments.
Claim 21
Dependent Claim
28 words
A silver halide photographic material according to claim 18, wherein said blue pigment has the following formula: ##STR6## wherein R independently may be H or any insolubilizing group.
Claim 22
Dependent Claim
35 words
A silver halide photographic material according to claim 18, wherein said blue pigment has the following formula: ##STR7## wherein R independently may be H or any insolubilizing group and Me is a divalent metallic atom.
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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) | 1996-05-24 | 1996-11-23 | 1997-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-24 | 2000-11-23 | 2001-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-24 | 2004-11-23 | 2005-05-25 | $7700.00 | Window Closed / Lapsed |