US3947450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Benzoxanthene and benzothioxanthene dicarboxylic acid imide dyestuffs and process for their manufacture
Assignee: Hoechst AG
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Filing: 1974-06-18
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Granted: 1976-03-30
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Expires: 1994-06-18
Abstract
Abstract Benzoxanthene- and benzothioxanthene-dicarboxylic acid imide dyestuffs of the general formula ##SPC1## Wherein X is oxygen or sulfur, R is amino which is substituted by one or two members of the group of alkyl, cyclohexyl, benzyl, acyl, phenyl, β-cyanoethyl, β-hydroxyethyl, sulfamidophenyl, benzoyl, dichlorobenzoyl, sulfamidobenzoyl, carboxamidophenyl, phenylsulfonyl sulfamidodichlorobenzoyl, chlorophenyl, phenoxyacetyl lower alkylsulfamidobenzoyl and benzimidazdyl, R 1 and R 2 are hydrogen chlorine, bromine, cyano, lower carbalkoxy, lower alkyl, lower alkoxy and phenyl, R 3 and R 4 are hydrogen, lower alkoxy and lower hydroxy alkoxy.
Inventors
- 👤 Otto Fuchs
- 👤 Helmut Troster
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:45
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
108 words
A benzoxanthene- or benzothioxanthene- dicarboxylic acid amino-imide dyestuff of the formula ##SPC14## wherein X is O or S, R 1 is hydrogen, chlorine, bromine, lower alkyl or lower alkoxy, R 2 is hydrogen, chlorine, bromine, lower alkyl, lower alkoxy, lower carbalkoxy or phenyl, R 1 and R 2 not being adjacent t.butyl groups, R 3 and R 4 each is hydrogen, lower alkoxy or hydroxy lower alkoxy, R 5 is hydrogen or, when R 6 is acetyl, acetyl and R 6 is cyclohexyl, lower alkanoyl, phenyl lower alkanoyl, phenoxy lower alkanoyl, cyano lower alkyl, hydroxy lower alkyl, phenyl sulfonyl, benzoyl, dichlorobenzoyl, sulfonamido-benzoyl, carbonamido-benzoyl, sulfonamido-dichlorobenzoyl, lower alkyl-sulfonamidobenzoyl or sulfonamido-benzimidazolyl.
Claim 2
Dependent Claim
108 words
A benzoxanthene- or benzothioxanthene- dicarboxylic acid amino-imide dyestuff of the formula ##SPC14## wherein X is O or S, R 1 is hydrogen, chlorine, bromine, lower alkyl or lower alkoxy, R 2 is hydrogen, chlorine, bromine, lower alkyl, lower alkoxy, lower carbalkoxy or phenyl, R 1 and R 2 not being adjacent t.butyl groups, R 3 and R 4 each is hydrogen, lower alkoxy or hydroxy lower alkoxy, R 5 is hydrogen or, when R 6 is acetyl, acetyl and R 6 is cyclohexyl, lower alkanoyl, phenyl lower alkanoyl, phenoxy lower alkanoyl, cyano lower alkyl, hydroxy lower alkyl, phenyl sulfonyl, benzoyl, dichlorobenzoyl, sulfonamido-benzoyl, carbonamido-benzoyl, sulfonamido-dichlorobenzoyl, lower alkyl-sulfonamidobenzoyl or sulfonamido-benzimidazolyl.
Claim 3
Dependent Claim
9 words
A dyestuff to claim 1 wherein X is O.
Claim 4
Dependent Claim
10 words
A dyestuff according to claim 1 wherein X is S.
Claim 5
Dependent Claim
33 words
A dyestuff according to claim 1 wherein X is O R 1 , R 2 , R 4 and R 5 each is hydrogen, R 3 is methoxy, and R 6 is β-hydroxy-ethyl.
Claim 6
Dependent Claim
45 words
A dyestuff according to claim 1 wherein X is S, R 1 and R 2 are bonded respectively to the 10 and 9 positions and each is methyl, R 3 and R 4 each is hydrogen, and R 5 and R 6 each is acetyl.
Claim 7
Dependent Claim
47 words
A dyestuff according to claim 1 wherein X is O, R, and R 2 are bonded respectively to the 10 and 9 positions, R 1 and R 3 each is methoxy, R 2 , R 4 and R 5 each is hydrogen and R 6 is 2,4-dichlorobenzoyl.
Claim 8
Dependent Claim
45 words
A dyestuff according to claim 1 wherein X is S, R 1 and R 2 are bonded respectively to the 10 and 9 positions and each is methyl, R 3 , R 4 , and R 5 each are hydrogen, and R 6 is n-nonadecanoyl.
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) | 1979-03-30 | 1979-09-29 | 1980-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-30 | 1983-09-29 | 1984-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-30 | 1987-09-29 | 1988-03-30 | $7700.00 | Window Closed / Lapsed |