US4146535A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azo dyes having a 3-cyano- or 3-carbamoyl-2,6-diamino-pyridine coupling component
Assignee: BASF SE
•
Filing: 1976-10-01
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Granted: 1979-03-27
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Expires: 1996-10-01
Abstract
Abstract Dye formulations for dyeing and printing cellulose and cellulosic textile material which in addition to conventional components contain a dye of the general formula (I): ##STR1## in which D is the radical of a diazo component; R is hydrogen, C 1 to C 7 alkyl, phenyl or phenyl bearing methyl as a substituent; X is cyano, carbamoyl or substituted carbamoyl; R 1 is hydrogen or an aliphatic, cycloaliphatic, araliphatic or aromatic radical; R 2 is hydrogen or an aliphatic, cycloaliphatic or araliphatic radical; R 3 and R 4 independently of one another have the same meanings as R 1 and R 2 ; and R 1 --n--r 2 and R 3 --N--R 4 independently of one another are saturated heterocyclic radicals.
Inventors
- 👤 Johannes Dehnert
- 👤 Gunther Lamm
- 👤 Werner Juenemann
- 👤 Guenter Meyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:20
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617; C09B29/3621; C09B29/3639; C09B29/0018; C09B31/00; C09B31/02; C09B31/12; C09B31/14; C09B31/153
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
6 words
The dye of the formula ##STR339##
Claim 2
Dependent Claim
6 words
The dye of the formula ##STR339##
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) | 1982-03-26 | 1982-09-25 | 1983-03-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-03-26 | 1986-09-25 | 1987-03-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-03-26 | 1990-09-25 | 1991-03-27 | $7700.00 | Window Closed / Lapsed |