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US4311787A
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Photographic silver halide materials containing dispersed light-absorbing merostyryl dyes
Assignee: Agfa Gevaert NV
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Filing: 1980-06-11
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Granted: 1982-01-19
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Expires: 2000-06-11
Abstract
Abstract Light-sensitive photographic silver halide material comprising a hydrophilic colloid layer containing in dispersed state a light-absorbing merostyryl dye that corresponds to the following general formula: ##STR1## in which: R 1 is hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, aralkyl or substituted aralkyl, R 2 is carboxy, alkoxycarbonyl, aryloxycarbonyl, carbamoyl, ureido, sulphamoyl or one of the groups represented by R 1 ; at least one of R 1 and R 2 being or containing carboxy or carbamoyl, R 3 is hydrogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, and when R 3 is alkyl or alkoxy it stands in ortho or para in respect of the hydroxy group, which itself is in ortho or para in respect of the methine group, said merostyryl dye containing no group that renders the dye soluble in the hydrophilic colloid layer.
Inventors
- 👤 Raymond G. Lemahieu
- 👤 Felix J. Moelants
- 👤 Frans J. Ville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 08:29
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/0091; G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C1/832
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
198 words
A light-sensitive photographic silver halide material comprising a hydrophilic colloid layer containing a light-absorbing merostyryl dye, wherein said dye is present in dispersed state and corresponds to the following general formula: ##STR20## in which: R 1 represents hydrogen, a C 1 -C 4 alkyl group, a substituted C 1 -C 4 alkyl group, an aryl group, a substituted aryl group, an aralkyl group or a substituted aralkyl group, R 2 is one of the groups represented by R 1 , a carboxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an ureido group, or a sulfamoyl group, at least one of R 1 and R 2 being or containing a carboxy group or a carbamoyl group, R 3 represents hydrogen, a C 1 -C 4 alkyl group, or a C 1 -C 4 alkoxy group, and where R 3 is a C 1 -C 4 alkoxy group or a C 1 -C 4 alkoxy group, it stands in ortho- or para-position in respect of the hydroxy group, which itself is in ortho- or para-position in respect of the methine group, said merostyryl dye containing no group that renders the dye soluble in the hydrophilic colloid layer.
Claim 2
Dependent Claim
198 words
A light-sensitive photographic silver halide material comprising a hydrophilic colloid layer containing a light-absorbing merostyryl dye, wherein said dye is present in dispersed state and corresponds to the following general formula: ##STR20## in which: R 1 represents hydrogen, a C 1 -C 4 alkyl group, a substituted C 1 -C 4 alkyl group, an aryl group, a substituted aryl group, an aralkyl group or a substituted aralkyl group, R 2 is one of the groups represented by R 1 , a carboxy group, an alkoxycarbonyl group, an aryloxycarbonyl group, a carbamoyl group, an ureido group, or a sulfamoyl group, at least one of R 1 and R 2 being or containing a carboxy group or a carbamoyl group, R 3 represents hydrogen, a C 1 -C 4 alkyl group, or a C 1 -C 4 alkoxy group, and where R 3 is a C 1 -C 4 alkoxy group or a C 1 -C 4 alkoxy group, it stands in ortho- or para-position in respect of the hydroxy group, which itself is in ortho- or para-position in respect of the methine group, said merostyryl dye containing no group that renders the dye soluble in the hydrophilic colloid layer.
Claim 3
Dependent Claim
13 words
A material according to claim 1, wherein said dye is dispersed in gelatin.
Claim 4
Dependent Claim
27 words
A material according to claim 1, comprising a support, at least one light-sensitive silver halide emulsion layer, and a layer containing dispersed therein said light-absorbing merostyryl dye.
Claim 5
Dependent Claim
34 words
A material according to claim 3, wherein the layer containing said light-absorbing merostyryl dye is a hydrophilic colloid antihalation layer coated at the side of the support carrying the light-sensitive silver halide emulsion layer(s).
Claim 6
Dependent Claim
35 words
A material according to claim 3, wherein the layer containing said light-absorbing merostyryl dye is an antihalation layer applied to the side of the support opposite to that carrying the light-sensitive silver halide emulsion layer(s).
Claim 7
Dependent Claim
39 words
A material according to claim 3, wherein the layer containing said light-absorbing merostyryl dye is a colloid filter layer shielding at least one optically sensitized silver halide emulsion layer from the light of the wavelength absorbed by said dye.
Claim 8
Dependent Claim
39 words
A material according to claim 5, wherein the support is a film support and the antihalation layer applied to the side of the support opposite to that carrying the light-sensitive silver halide emulsion layer(s) comprises a water-insoluble, alkali-soluble binder.
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) | 1985-01-18 | 1985-07-20 | 1986-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-01-18 | 1989-07-20 | 1990-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-01-18 | 1993-07-20 | 1994-01-19 | $7700.00 | Window Closed / Lapsed |