US3801602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-imino-6-amino-substituted coumarins
Assignee: BASF SE
•
Filing: 1972-06-06
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Granted: 1974-04-02
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Expires: 1992-06-06
Abstract
Abstract FLUORESCENT DYES CONTAINING A 2-IMINO-6-SUBSTITUTED COUMARIN MOIETY. THE DYES ARE EMINENTLY SUITABLE FOR USE IN TEXTILE PRINTING COLORS AND GIVE BRILLIANT YELLOW SHADES HAVING GOOD FASTNESS PROPERTIES.
Inventors
- 👤 V Radtke
- 👤 H Scheuermann
- 👤 W Mach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:31
CPC Classifications
C; C09; C09B; C09B57/00; C09B57/02; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/58; C09K; C09K11/00; C09K11/06
Claims Analysis
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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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |