US3661889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-insoluble phenyl-azo-phenyl dyes
Assignee: BASF SE
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Filing: 1970-02-06
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Granted: 1972-05-09
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Expires: 1990-02-06
Abstract
Abstract WATER-INSOLUBLE P-AMINOAZO DYES BEARING A PHENOXYACETOXYETHYL SUBSTITUENT ON THE AMINO NITROGEN. THESE DYES ARE PARTICULARLY USEFUL FOR DYEING SYNTHETIC LINEAR POLYESTERS.
Inventors
- 👤 Guenter Lange
- 👤 Hans Guenter Wippel
- 👤 Rudolf Bermes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 01:27
CPC Classifications
C; C09; C09B; C09B43/00; C09B43/18; C09B43/20; C09B43/202
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |