US3658784A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Monoazo dyes containing a benzoisothiazole
Assignee: BASF SE
•
Filing: 1969-05-27
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Granted: 1972-04-25
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Expires: 1989-05-27
Abstract
Abstract WATER-INSOLUBLE P-AMINAZO DYES HAVING AN ACETOACETOXYALYL GROUP ON THE AMINO NITROGEN ATOM WHICH ARE PARTICULARLY USEFUL FOR DYEING CELLULOSE ESTERS AND SYNTHETIC LINEAR POLYESTERS.
Inventors
- 👤 Guenther Lange
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:23
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/06; C09B29/08
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) | 1975-04-25 | 1975-10-25 | 1976-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-25 | 1979-10-25 | 1980-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-25 | 1983-10-25 | 1984-04-25 | $7700.00 | Window Closed / Lapsed |