US3755287A
Expired / Lapsed
US
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Heterocyclic disazo dyestuffs containing a bridging group and at least one quaternary ammonium group
Assignee: Novartis AG
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Filing: 1971-05-19
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Granted: 1973-08-28
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Expires: 1991-05-19
Abstract
Abstract Disazo compounds in which two monoazo dyestuff molecules of the general formula IN WHICH D represents the residue of heterocyclic diazo component, A represents an arylene residue and R'' and R'''' each represents an alkyl residue, are linked together via their coupling components through a bifunctional bridging group Z which has no dyestuff characteristics and which contains at least one quaternated nitrogen atom. The compounds are used for dyeing synthetic fibers such as polyvinyl chloride and demonstrate good light and washing fastness.
Inventors
- 👤 G Hegar
- 👤 H Angliker
- 👤 R Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:35
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/81; C09; C09B; C09B33/00; C09B33/02; C09B33/06; C09B43/00; C09B44/00; C09B44/02; C09B44/04; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
8 words
A disazo dyestuff which corresponds to the formula
Claim 2
Dependent Claim
22 words
A disazo compound as claimed in claim 1, in which the bridging group Z contains at least one group of the formula
Claim 3
Dependent Claim
12 words
A disazo dyestuff as claimed in claim 1, in which X3 1.
Claim 4
Dependent Claim
38 words
A disazo dyestuff as claimed in claim 2, in which Z is a residue of the formula -NH-CO-Z''-CO-NH-wherein Z'' is pyridinium or azaalkylene of up to six carbon atoms in which the nitrogen atom carries a positive charge.
Claim 5
Dependent Claim
13 words
A disazo dyestuff as claimed in claim 2, which corresponds to the formula
Claim 6
Dependent Claim
23 words
A disazo dyestuff as claimed in claim 2, wherein R1 and R2 form tetrahydroquinoline and wherein R3 and R4 are beta-(hydroxy-or C1-C3-alkyl-carbonyl-oxy) propylene.
References Cited (Backward Citations)
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US2263994A
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US2286391A
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US2813856A
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US2879265A
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US2945849A
Cited
US3271383A
Cited
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Cited
US3635940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |