Patent US3907769A successfully refreshed from Google Patents.
US3907769A
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Azo compounds containing a 2,6-diaminopyridine coupler component
Assignee: BASF SE
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Filing: 1973-03-28
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Granted: 1975-09-23
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Expires: 1993-03-28
Abstract
Abstract in which D is the radical of a diazo component; E is hydrogen, unsubstituted or substituted alkyl or phenyl; Z is cyano or carbamoyl; R is hydrogen or an unsubstituted or substituted aliphatic, araliphatic, cycloaliphatic or aromatic radical or two radicals R together with the nitrogen atom form a saturated heterocyclic ring; and N IS 1, 2 OR 3. The dyes are eminently suitable for dyeing natural and synthetic polyamides and give bright yellow to violet colorations having excellent fastness properties. Azo acid dyes which contain one, two or three water-solubilizing sulfo groups and which, in the form of the free acids, correspond to the formula (I): D R A W I N G
Inventors
- 👤 Johannes Dehnert
- 👤 Gunther Lamm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:36
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/84; C07D213/85; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617; C09B29/3621; C09B29/3639; C09B31/00; C09B31/02; C09B31/12; C09B31/14; C09B31/153; C09B43/00; C09B43/02; C09B43/18; C09B43/24; C09B62/00; C09B62/44; C09B62/78; C09B62/82
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
15 words
A WATER-SOLUBLE ACID DYE WHICH IN THE FORM OF THE FREE ACID HAS THE FORMULA
Claim 2
Dependent Claim
15 words
A WATER-SOLUBLE ACID DYE WHICH IN THE FORM OF THE FREE ACID HAS THE FORMULA
Claim 3
Dependent Claim
10 words
A dye as claimed in claim 1 of the formula:
Claim 4
Dependent Claim
10 words
A dye as claimed in claim 1 of the formula
Claim 5
Dependent Claim
10 words
A dye as claimed in claim 1 of the formula:
Claim 6
Dependent Claim
11 words
A dye as claimed in claim 1 where Z is cyano.
Claim 7
Dependent Claim
5 words
The dye of the formula
Claim 8
Dependent Claim
5 words
The dye of the formula
Claim 9
Dependent Claim
5 words
The dye of the formula
Claim 10
Dependent Claim
5 words
The dye of the formula
Claim 11
Dependent Claim
5 words
The dye of the formula
Claim 12
Dependent Claim
5 words
The dye of the formula
References Cited (Backward Citations)
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Cited
US2145579A
Cited
US2068353A
Cited
US2681906A
Cited
US3531457A
Cited
US3531458A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-22 | 1979-03-24 | 1979-09-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-22 | 1983-03-24 | 1983-09-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-22 | 1987-03-24 | 1987-09-23 | $7700.00 | Window Closed / Lapsed |