Patent US4959294A successfully refreshed from Google Patents.
US4959294A
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Infra-red sensitising dyes for silver halide
Assignee: Tulalip Consultoria Comercial SU
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Filing: 1988-04-14
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Granted: 1990-09-25
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Expires: 2008-04-14
Abstract
Abstract Infra-red sensitizing dyes for silver halide having a mucleus of the general formula: ##STR1## in which: Q represents Cl or Br, R 3 represents an alkyl or substituted alkyl, n is 0, 1, 2 or 3, X is an anion of molecular weight up to 400 which may be incorporated in one R 3 group.
Inventors
- 👤 Bernard A. Lea
- 👤 Ronald W. Burrows
- 👤 Thomas D. G. Hellings
- 👤 Charles G. Barlow
- 👤 Ivan H. Skoog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:48
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/0066; G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/127; Y; Y10; Y10S; Y10S430/00; Y10S430/145; Y10S430/146
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
74 words
A photographic silver halide emulsion sensitive to infrared radiation characterised in that it comprises from 0.5 to 500 mg per mole of silver halide of a dye having a nucleus comprising: ##STR10## in which: Q represents Cl or Br, R 3 represents an alkyl or substituted alkyl group, n is 0, 1, 2 or 3, X is an anion of molecular weight up to 400 which may be incorporated in one R 3 group.
Claim 2
Dependent Claim
74 words
A photographic silver halide emulsion sensitive to infrared radiation characterised in that it comprises from 0.5 to 500 mg per mole of silver halide of a dye having a nucleus comprising: ##STR10## in which: Q represents Cl or Br, R 3 represents an alkyl or substituted alkyl group, n is 0, 1, 2 or 3, X is an anion of molecular weight up to 400 which may be incorporated in one R 3 group.
Claim 3
Dependent Claim
31 words
An emulsion as claimed in claim 1 characterised in that the dye has one of the following nuclei: ##STR11## in which: X and R 3 are as define in claim 1.
Claim 4
Dependent Claim
137 words
A photographic silver halide emulsion sensitive to infrared radiation characterised in that it comprises from 0.5 to 500 mg per mole of silver halide of a dye of the general formula: ##STR12## in which: Q represents Cl or Br, R 3 represents an alkyl or substituted alkyl group, n is 0, 1, 2 or 3, X is an anion of molecular weight up to 400 which may be incorporated in one R 3 group, each R 1 and R 2 independently represent hydrogen or a substituent of the type present in cyanine dyes, R 4 to R 9 each independently represent hydrogen or a lower alkyl group of 1 to 3 carbon atoms or any two of these substituents on adjacent carbon atoms may together represent the necessary atoms to complete a fused benzene ring, if n=0.
Claim 5
Dependent Claim
137 words
A photographic silver halide emulsion sensitive to infrared radiation characterised in that it comprises from 0.5 to 500 mg per mole of silver halide of a dye of the general formula: ##STR12## in which: Q represents Cl or Br, R 3 represents an alkyl or substituted alkyl group, n is 0, 1, 2 or 3, X is an anion of molecular weight up to 400 which may be incorporated in one R 3 group, each R 1 and R 2 independently represent hydrogen or a substituent of the type present in cyanine dyes, R 4 to R 9 each independently represent hydrogen or a lower alkyl group of 1 to 3 carbon atoms or any two of these substituents on adjacent carbon atoms may together represent the necessary atoms to complete a fused benzene ring, if n=0.
Claim 6
Dependent Claim
33 words
An emulsion as claimed in claim 3 characterised in that the dye has the general formula: ##STR13## in which: R 1 to R 5 and X - are as claimed in claim 3.
Claim 7
Dependent Claim
112 words
An emulsion as claimed in claim 3 characterised in that n is 0 or 1 and R 1 and R 2 are selected from hydrogen, lower alkyl groups of 1 to 5 carbon atoms, lower alkenyl groups of 2 to 5 carbon atoms, lower alkoxy groups of 1 to 5 carbon atoms, aryl groups, aralkyl groups, alkaryl groups, halogen, alkylamino, alkylthio, carboalkoxy, in which the alkyl chains contain up to 5 carbon atoms, --NH 2 , --NO 2 , --NHCOCH 3 and --(CH 2 ) m COOH where m=1 to 5 or R 1 and R 2 together represent the necessary atoms to complete a fused ring which may possess ring substituents.
Claim 8
Dependent Claim
25 words
An emulsion as claimed in claim 3 characterised in that the dye is selected from: ##STR14## in which: X is as defined in claim 3.
Claim 9
Dependent Claim
29 words
An emulsion as claimed in claim 2 characterised in that the compound is present in an amount in the range 5 to 250 mg per mole of silver halide.
Claim 10
Dependent Claim
17 words
A photographic element comprising a support bearing a photographic silver halide emulsion as claimed in claim 1.
Claim 11
Dependent Claim
56 words
An element as claimed in claim 8 in the form of a photolithographic sheet capable of forming a lithographic printing plate upon imaging via a silver salt diffusion transfer comprising a support, a silver halide emulsion layers and a receptor layer overlying the emulsion, the receptor layer containing catalytic nuclei for silver salt diffusion transfer development.
Claim 12
Dependent Claim
73 words
An element as claimed in claim 9 in the form of a photolithographic sheet capable of forming a lithographic printing plate upon imaging via a silver salt diffusion transfer comprising a support, a silver halide emulsion layer and a receptor layer overlying the emulsion, the receptor layer comprising a high molecular weight hydrophilic polymer and catalytic nuclei for silver salt diffusion transfer development, the major proportion of the polymer being a dialdehyde polysaccharide.
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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) | 1993-09-24 | 1994-03-26 | 1994-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-09-24 | 1998-03-26 | 1998-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-09-24 | 2002-03-26 | 2002-09-25 | $7700.00 | Window Closed / Lapsed |