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US4110116A
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Fogged direct positive silver halide emulsion containing a cyanine dye having at least one benzoxazole or benzothiazole nucleus substituted with halogen atoms
Assignee: 3M Co
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Filing: 1977-03-16
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Granted: 1978-08-29
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Expires: 1997-03-16
Abstract
Abstract New cyanine dyes derived from di-halogen-benzoxazoles and benzothiazoles are desensitizers for silver halide negative emulsions and useful electron acceptor spectral sensitizers for direct positive silver halide emulsions.
Inventors
- 👤 Paolo Beretta
- 👤 Luigi Valbusa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:13
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48515; G03C1/48523; G03C1/4853; C; C09; C09B; C09B23/00; C09B23/02; C09B23/06; C09B23/08; C09B23/083; C09B23/086; C09B23/10; C09B23/105; C09B23/107; C09B23/14; C09B23/145
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
112 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of at least one cyanine dye selected from the formulae: wherein Y is an oxygen or sulfur atom, n is 2, 3, or 4, m is 1 or 2, R and R 1 are independently halogen atoms, R 2 is H or an alkyl group of 1 to 4 carbon atoms, R 3 is selected from the group consisting of acylic hydrocarbon, alkyl-aryl, or aryl groups, R 4 is H or alkyl of 1 to 3 carbon atoms, Z represents the non-metallic atoms required to complete a 5 or 6 membered desensitizing heterocyclic nucleus, and X is an acid anion.
Claim 2
Dependent Claim
112 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of at least one cyanine dye selected from the formulae: wherein Y is an oxygen or sulfur atom, n is 2, 3, or 4, m is 1 or 2, R and R 1 are independently halogen atoms, R 2 is H or an alkyl group of 1 to 4 carbon atoms, R 3 is selected from the group consisting of acylic hydrocarbon, alkyl-aryl, or aryl groups, R 4 is H or alkyl of 1 to 3 carbon atoms, Z represents the non-metallic atoms required to complete a 5 or 6 membered desensitizing heterocyclic nucleus, and X is an acid anion.
Claim 3
Dependent Claim
89 words
The light-sensitive fogged direct positive silver halide emulsion of claim 1 containing a sensitizing amount of at least one dye of the formula: ##STR39## wherein: Y is an oxygen or sulfur atom, n is 2, 3, or 4, R and R 1 independently represent a halogen atom, R 2 is H or an alkyl group of 1 to 4 carbon atoms, R 3 represents an acyclic hydrocarbon, alkyl-aryl, or aryl group, R 4 is H or alkyl of 1 to 3 carbon atoms, and X represents an acid anion.
Claim 4
Dependent Claim
34 words
The emulsion of claim 2 wherein R and R 1 are independently selected from the group consisting of Cl and Br and R 3 is an alkyl group of 1 to 12 carbon atoms.
Claim 5
Dependent Claim
25 words
The emulsion of claim 3 wherein R and R 1 are the same halogen and R 3 is alkyl of 1 to 4 carbon atoms.
Claim 6
Dependent Claim
103 words
The light-sensitive fogged direct positive silver halide emulsion of claim 1 containing a sensitizing amount of at least one dye of the formula: ##STR40## wherein: m is 1 or 2, Z represents the C, S, O, Se, or N atoms necessary to complete a 5- or 6-membered desensitizing heterocyclic nucleus, Y is an oxygen or sulfur atom, n is 2, 3, or 4, R and R 1 independently represent a halogen atom, R 2 is H or an alkyl group of 1 to 4 carbon atoms, R 3 represents an acyclic hydrocarbon, alkyl aryl, or aryl group, and X represents an acid anion.
Claim 7
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3'-diethyl-5,7-5',7'-tetrabromo-oxacarbocyanine perchlorate.
Claim 8
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3'-diethyl-5,7-5',7'-tetrabromo-oxacarbocyanine perchlorate.
Claim 9
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3'-dimethyl-5,7-5',7'-tetrabromo-9-ethyl-oxacarbocyanine perchlorate.
Claim 10
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3'-dimethyl-5,7-5',7'-tetrabromo-9-ethyl-oxacarbocyanine perchlorate.
Claim 11
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3'-diethyl-5,7-5',7'-tetrachloro-6,6'-dimethyloxacarbocyanine ethylsulfate.
Claim 12
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3'-diethyl-5,7-5',7'-tetrachloro-6,6'-dimethyloxacarbocyanine ethylsulfate.
Claim 13
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3'-diethyl-5,6-5',6'-tetrachloro-thiacarbocyanine bromide.
Claim 14
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3'-diethyl-5,6-5',6'-tetrachloro-thiacarbocyanine bromide.
Claim 15
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3'-diethyl-5,7-5',7'-tetrachloro-thiocarbocyanine iodide.
Claim 16
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3'-diethyl-5,7-5',7'-tetrachloro-thiocarbocyanine iodide.
Claim 17
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3',9-triethyl-5,7-5',7'-tetrachloro-thiocarbocyanine iodide.
Claim 18
Dependent Claim
15 words
A light-sensitive fogged direct positive silver halide emulsion containing a sensitizing amount of 3,3',9-triethyl-5,7-5',7'-tetrachloro-thiocarbocyanine iodide.
Claim 19
Dependent Claim
16 words
The light-sensitive fogged direct positive silver halide emulsion of claim 1 also containing a color coupler.
Claim 20
Dependent Claim
17 words
A direct positive photographic element containing at least one layer of the light-sensitive emulsion of claim 1.
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) | 1981-08-28 | 1982-02-27 | 1982-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-28 | 1986-02-27 | 1986-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-28 | 1990-02-27 | 1990-08-29 | $7700.00 | Window Closed / Lapsed |