US3558620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone reactive dyestuffs
Assignee: Bayer AG
•
Filing: 1968-05-24
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Granted: 1971-01-26
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Expires: 1988-05-24
Abstract
Abstract ANTHRAQUINONE REACTIVE DYESTUFFS USEFUL IN DYEING HYDROXYL AND NITROGEN-CONTAINING TEXTILES HAVING A NUCLEUS CONSISTING OF A SUBSTITUTED OR UNSUBSTITUTED 1-AMINO-2SULFO-4 (SUBSTITUTED OR UNSUBSTITUTED (4''-AMINO- OR ALKYLENE AMINO-TRIAZINYL) ANALINO) ANTHRAQUINONE. THE DYESTUFFS SHOW IMPROVED FASTNESS PROPERTIES.
Inventors
- 👤 Hans-Samuel Bien
- 👤 Erich Klauke
- 👤 Klaus Wunderlich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:38
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/02; C09B62/04; C09B62/06
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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |