US3617210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for dyeing polyamides with dyes containing sulfonic acid groups
Assignee: BASF SE
•
Filing: 1969-10-06
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Granted: 1971-11-02
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Expires: 1989-10-06
Abstract
Abstract A process for dyeing polyamide textile material with acid dyes of the 3-imidazolyl-7-aminocoumarin series.
Inventors
- 👤 Johannes Dehnert
- 👤 Gerhard Grau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:14
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/02; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/924
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3014041A
Cited
US3501490A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-01 | 1975-05-03 | 1975-11-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-01 | 1979-05-03 | 1979-11-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-01 | 1983-05-03 | 1983-11-02 | $7700.00 | Window Closed / Lapsed |