US3956263A
Expired / Lapsed
US
⏱️ 0.0 years remaining
4-Methyl-2,6-dihydroxy-3-cyanopyridine containing dyestuffs
Assignee: Novartis AG
•
Filing: 1973-11-01
•
Granted: 1976-05-11
•
Expires: 1993-11-01
Abstract
Abstract Water-soluble copper-, chromium-, cobalt- or nickel- complexes of dyestuffs containing at least one sulfo group and a group of the formula ##SPC1## Are disclosed. These dyequffs are useful in dyeing man-made fibers, especially wool, and are fast to light and wet treatments.
Inventors
- 👤 Arthur Buehler
- 👤 Alfred Fasciati
- 👤 Gerd Hoelzie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:39
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/006; C09B62/0068; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3617; C09B29/3621; C09B29/3626; C09B45/00; C09B45/02; C09B45/025; C09B62/012
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
70 words
A water-soluble copper-, chromium-, cobalt-, or nickel- complex of a dyestuff of the formula ##EQU5## wherein D is benzene or naphthalene which is a. substituted in the ortho position to the azo group by carboxy, hydroxy, or methoxy, and b. substituted by at least one sulphonic acid group and c. is further unsubstituted or substituted by hydroxy, methoxy, acetylamino, chloro, nitro, cyano, benzoylamino, carboxy, 3-sulphophenylazo, amino, methyl, 4,8-disulphonapthylazo or 4-methyl-3-sulphobenzenesulphonyl.
Claim 2
Dependent Claim
70 words
A water-soluble copper-, chromium-, cobalt-, or nickel- complex of a dyestuff of the formula ##EQU5## wherein D is benzene or naphthalene which is a. substituted in the ortho position to the azo group by carboxy, hydroxy, or methoxy, and b. substituted by at least one sulphonic acid group and c. is further unsubstituted or substituted by hydroxy, methoxy, acetylamino, chloro, nitro, cyano, benzoylamino, carboxy, 3-sulphophenylazo, amino, methyl, 4,8-disulphonapthylazo or 4-methyl-3-sulphobenzenesulphonyl.
Claim 3
Dependent Claim
47 words
A dyestuff according to claim 1 wherein D is benzene or napthalene which is a. substituted in the ortho position to the azo group by hydroxy, and b. substituted by at least one sulphonic acid group, and c. is further unsubstituted or substituted by nitro or chloro.
Claim 4
Dependent Claim
17 words
The 1:2-chromium complex compound as claimed in claim 2 of the azo dyestuff of the formula ##SPC21##
Claim 5
Dependent Claim
17 words
The 1:2-cobalt complex compound as claimed in claim 4 of the azo dyestuff of the formula ##SPC22##
Claim 6
Dependent Claim
17 words
The 1:2-cobalt complex compound as claimed in claim 2 of the azo dyestuff of the formula ##SPC23##
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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) | 1979-05-11 | 1979-11-10 | 1980-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-05-11 | 1983-11-10 | 1984-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-05-11 | 1987-11-10 | 1988-05-11 | $7700.00 | Window Closed / Lapsed |