US3575954A
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Azo dyestuffs derived from stilbene and containing a naphthotriazolo group
Assignee: PRODUITS CHIMIQUES UGINE KUKLMANN
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Filing: 1968-03-21
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Granted: 1971-04-20
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Expires: 1988-03-21
Abstract
Abstract AZO DYESTUFFS OF THE FORMULA: =(N-(3-(H-O3S-)-1,4-PHENYLENE)-CH=CH-(2-(H-O3S-)- 1,4-PHENYLENE)-N=N-(1,4-PHENYLENE)- (2H-NAPTHO(1,2-D)TRIAZOLYLENE)-SO3-H)2 WHEREIN THE BENZENE NUCLEUS A IS UNSUBSTITUTED OR SUBSTITUTED BY ONE OR MORE ALKYL AND/OR ALKOXY GROUPS, AND PROCESS FOR THEIR PREPARTION. THESE DYESTUFFS ARE PARTICULARLY WELL SUITED FOR DYEING OF CELLULOSIC FIBRES AND THE SHADES OBTAINED ARE DISTINGUISHED BY THEIR GOOD GENERAL FASTNESS ESPECIALLY TO WATER AND WASHING.
Inventors
- 👤 Marcel Georges Jirou
- 👤 Vasili Urne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:24
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/08; C09B43/10; C09B43/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |