US4446227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dyestuffs and their use in photographic material
Assignee: Novartis AG
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Filing: 1982-09-20
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Granted: 1984-05-01
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Expires: 2002-09-20
Abstract
Abstract The new compounds of the general formula ##STR1## where R 1 is hydrogen, alkyl or cyclic alkyl, R 2 and R 3 are each hydrogen, alkyl, a carboxylic acid, ester or amide group or cyano, and R 4 , R 5 and R 6 are each alkyl or aryl, are useful as antihalation dyes and as image dyes in photographic materials for dye-bleaching processes.
Inventors
- 👤 William E. Long
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:15
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/16; C09B23/162; C09B23/164; G; G03; G03C; G03C1/00; G03C1/76; G03C1/825; G03C1/83; G03C7/00; G03C7/28
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
193 words
A silver halide photographic material which comprises in at least one layer thereof at least one dyestuff of the formula ##STR8## where R 1 is hydrogen, alkyl having 2 to 10 carbon atoms which is unsubstituted or substituted by chlorine, bromine, hydroxyl, alkoxy having 1 to 4 carbon atoms or a carboxylic acid (--COOH) group, or R 1 is cyclopentyl or cyclohexyl, R 2 and R 3 are each hydrogen, alkyl having 1 to 8 carbon atoms which is unsubstituted or substituted by hydroxyl, a carboxylic acid (--COOH) group, cyano or nitro, or R 2 and R 3 are each a carboxylic acid (--COOH) group, a carboxylic ester group having 2 to 5 carbon atoms, a carboxylic amide (--CONH 2 ) group or cyano, and R 4 , R 5 and R 6 are each alkyl having 1 to 6 carbon atoms which is unsubstituted or substituted by chlorine, bromine, hydroxyl, alkoxy having 1 to 4 carbon atoms or a carboxylic acid (--COOH) group, or R 4 , R 5 and R 6 are each phenyl which is unsubstituted or substituted by chlorine, bromine, hydroxyl, cyano, nitro or a carboxylic acid (--COOH) group.
Claim 2
Dependent Claim
193 words
A silver halide photographic material which comprises in at least one layer thereof at least one dyestuff of the formula ##STR8## where R 1 is hydrogen, alkyl having 2 to 10 carbon atoms which is unsubstituted or substituted by chlorine, bromine, hydroxyl, alkoxy having 1 to 4 carbon atoms or a carboxylic acid (--COOH) group, or R 1 is cyclopentyl or cyclohexyl, R 2 and R 3 are each hydrogen, alkyl having 1 to 8 carbon atoms which is unsubstituted or substituted by hydroxyl, a carboxylic acid (--COOH) group, cyano or nitro, or R 2 and R 3 are each a carboxylic acid (--COOH) group, a carboxylic ester group having 2 to 5 carbon atoms, a carboxylic amide (--CONH 2 ) group or cyano, and R 4 , R 5 and R 6 are each alkyl having 1 to 6 carbon atoms which is unsubstituted or substituted by chlorine, bromine, hydroxyl, alkoxy having 1 to 4 carbon atoms or a carboxylic acid (--COOH) group, or R 4 , R 5 and R 6 are each phenyl which is unsubstituted or substituted by chlorine, bromine, hydroxyl, cyano, nitro or a carboxylic acid (--COOH) group.
Claim 3
Dependent Claim
37 words
A silver halide photogrphic material according to claim 1 wherein R 1 is alkyl having 2, 3 or 4 carbon atoms which is unsubstituted or substituted by hydroxyl or a carboxylic acid (--COOH) group; cyclopentyl or cyclohexy.
Claim 4
Dependent Claim
61 words
A silver halide photographic material according to claim 1 where R 2 and R 3 are each hydrogen, alkyl having 1 to 4 carbon atoms, which is unsubstituted or substituted by hydroxyl, a carboxylic acid (--COOH) group, cyano or nitro; cyano, a carboxylic acid (--COOH) a carboxylic --CONH 2 amide or a carboxylic ester group having 2 to 5 carbon atoms.
Claim 5
Dependent Claim
68 words
A silver halide photographic material according to claim 1 where R 4 , R 5 and R 6 are each alkyl having 1 to 4 carbon atoms, which is unsubstituted or substituted by chlorine, bromine, hydroxyl, alkoxy having 1 to 4 carbon atoms, or a carboxylic acid (--COOH) group; or phenyl, which is unsubstituted or substituted by chlorine, bromine, hydroxyl, cyano, nitro or a carboxylic acid (--COOH) group.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |