US3635940A
Expired / Lapsed
US
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Disazo dyestuffs containing a bridging group and at least one quaternary ammonium group
Assignee: BASF Schweiz AG
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Filing: 1968-05-21
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Granted: 1972-01-18
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Expires: 1988-05-21
Abstract
Abstract DISAZO COMPOUNDS OF THE FORMULA D-N=N-A-N(-R'')-R" D-N=N-(A-N-(-R'')-R")-Z-(N(-R'')(-R")-A)-N=N-D IN WHICH D REPRESENTS THE RESIDUE OF A MONOCYCLIC OR BICYCLIC DIAZO COMPONENT, A REPRESENTS AN ARYLENE RESIDUE AND R'' AND R" EACH REPRESENTS AN ALKYL RESIDUE, ARE LINKED TOGETHER VIA THEIR COUPLING COMPONENTS THROUGH A BIFUNCTIONAL BRIDGING GROUP Z WHICH HAS NO DYESTUFF CHARACTERTISTICS AND WHICH CONTAINS AT LEAST ONE QUATERNATED NITROGEN ATOM. THE COMPOUNDS ARE USEFUL FOR DYEING AND PRINTING SYNTHETIC FIBERS, AND PRODUCE INTENSE AND LEVEL DYEINGS POSSESSING GOOD FASTNESS TO LIGHT, WASHING, PERSPIRATION AND SUBLIMATION.
Inventors
- 👤 Gert Hegar
- 👤 Hans-Joerg Angliker
- 👤 Richard Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:31
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/81; C09; C09B; C09B33/00; C09B33/02; C09B33/06; C09B43/00; C09B44/00; C09B44/02; C09B44/04; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
Claims Analysis
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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) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |