US3672816A
Expired / Lapsed
US
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Process for dyeing synthetic polyamide textiles with disazo dyestuffs
Assignee: BASF SE
•
Filing: 1970-07-09
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Granted: 1972-06-27
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Expires: 1990-07-09
Abstract
Abstract PROCESS FOR THE FAST DYEING OF SYNTHETIC POLYAMIDES WITH DISAZO DYES DERIVED FORM 4,4''-DIAMINO-STILBENE-2,2''-DISULFONIC ACID AS DIAZO COMPONENT AND A PHENOL OR PHENOLS AS COUPLING COMPONENT.
Inventors
- 👤 Johannes Dehnert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:50
CPC Classifications
C; C09; C09B; C09B35/00; C09B35/02; C09B35/039; C09B35/205; C09B35/215; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
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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) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |