US3642767A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble disperse monoazo dyes
Assignee: BASF SE
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Filing: 1968-09-16
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Granted: 1972-02-15
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Expires: 1988-09-16
Abstract
Abstract WATER-INSOLUBLE DISPERSE MONOAZO DYES HAVING AN AROMATIC OR HETEROCYCLIC DIAZO COMPONENT AND A PARA-AMINOPHENYL COUPLING COMPONENT IN WHICH THE AMINO NITROGEN ATOM IS SUBSTITUTED BY PHENYLETHYL AND BY AN ETHYL OR PROPYL GROUP SUBSTITUTED BY HYDROXY, METHOXY, ETHOXY, ACETOXY O PROPIONYLOXY GROUPS. THESE DISPERSION DYES ARE USEFUL AS APPLIED TO HYDROPHOBIC FIBERS, ESPECIALLY POLYESTER FIBERS SUCH AS POLYETHYLENE TEREPHTHALATE AND EXHIBIT GOOD FASTNESS TO LIGHT, WETTING AND THE EFFECT OF HIGH TEMPERATURES.
Inventors
- 👤 Erwin Hahn
- 👤 Hans Guenter Wippel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:45
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08; C09B29/0025; D; D06; D06P; D06P1/00; D06P1/16; D06P1/18
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) | 1975-02-14 | 1975-08-16 | 1976-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-14 | 1979-08-16 | 1980-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-14 | 1983-08-16 | 1984-02-15 | $7700.00 | Window Closed / Lapsed |