US3828040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anthraquinone reactive dyestuffs
Assignee: Bayer AG
•
Filing: 1970-07-17
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Granted: 1974-08-06
•
Expires: 1990-07-17
Abstract
Abstract ANTHRAQUINONE REACTIVE DYESTUFFS CONSISTING OF 1,4,5TRIAMINO ANTHRAQUINONES WHEREIN THE 1 AND 4 -AMINO GROUPS ARE SUBSTITUTED BY SULFOARYLENE, SULFOARALKYLENE OR SULFATOALKYLENE RADICALS AND THE 5-AMINO GROUP IS SUBSTITUTED BY A REACTIVE GROUP. THE DYESTUFFS ARE ESPECIALLY SUITABLE FR USE IN DYEING HYDROXYL OR NITROGEN CONTAINING TEXTILE MATERIALS, ESPECIALLY NATURAL AND REGENERATED CELLULOSE, WOOL, SILK, SYNTHETIC POLYAMIDE AND POLYURETHANE FIBERS THEREBY YIELDING DYEINGS OF EXCELLENT FASTNESS PROPERTIES.
Inventors
- 👤 H Bien
- 👤 H Leister
- 👤 W Harms
- 👤 R Schmitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:31
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/004
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) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |