Patent US4292239A successfully refreshed from Google Patents.
US4292239A
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Benzisothiazole azo dyestuffs containing polyether groups
Assignee: Bayer AG
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Filing: 1979-08-13
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Granted: 1981-09-29
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Expires: 1999-08-13
Abstract
Abstract Dyestuffs of the formula ##STR1## wherein R 1 represents hydrogen, alkyl or aralkyl, R 2 represents R 1 or aryl, A represents C 2 -C 6 -alkylene, X represents R 2 or acyl, n represents 1-7, m represents 1 or 2 and the rings B and D can contain customary radicals, with the proviso that n is at least 2 if X represents acyl, give, when mixed with emulsifiers, dyestuff preparations which are in the liquid or dissolved form under dyeing conditions. The use of additional dispersing agents, protective colloids, levelling agents and carriers when dyeing polyester fibres thereby becomes superfluous.
Inventors
- 👤 Winfried Kruckenberg
- 👤 Karl H. Schundehutte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:27
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; C09B29/0805; C09B29/0025; C09B29/0074; C09B29/0077; C09B29/0081; C09B29/0801; C09B29/0802; C09B67/00; C09B67/0071; C09B67/008
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
52 words
A dyestuff of the formula ##STR79## wherein V 1 is H, methyl or ethyl, V 2 is H, methyl, methoxy, ethoxy, or Cl, V 3 is H, methyl, ethyl, methoxymethyl or ethoxymethyl, V 4 is H, Cl or Br, X 1 is C 1-4 -n-alkyl, and p is from 3 to 6.
Claim 2
Dependent Claim
52 words
A dyestuff of the formula ##STR79## wherein V 1 is H, methyl or ethyl, V 2 is H, methyl, methoxy, ethoxy, or Cl, V 3 is H, methyl, ethyl, methoxymethyl or ethoxymethyl, V 4 is H, Cl or Br, X 1 is C 1-4 -n-alkyl, and p is from 3 to 6.
Claim 3
Dependent Claim
43 words
A dyestuff of the formula ##STR80## wherein U 1 is hydrogen, methoxyethyl, ethoxyethyl, methyl or ethyl, U 2 is methyl, methoxy or hydrogen, U 3 is methoxy, methyl or hydrogen, X 1 is C 1-4 -n-alkyl, and q is 4, 5 or 6.
Claim 4
Dependent Claim
43 words
A dyestuff of the formula ##STR80## wherein U 1 is hydrogen, methoxyethyl, ethoxyethyl, methyl or ethyl, U 2 is methyl, methoxy or hydrogen, U 3 is methoxy, methyl or hydrogen, X 1 is C 1-4 -n-alkyl, and q is 4, 5 or 6.
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) | 1984-09-28 | 1985-03-30 | 1985-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-28 | 1989-03-30 | 1989-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-28 | 1993-03-30 | 1993-09-29 | $7700.00 | Window Closed / Lapsed |