US3711460A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reactive disazo dyestuffs containing fiber-reactive pyrimidine groups
Assignee: Bayer AG
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Filing: 1967-11-30
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Granted: 1973-01-16
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Expires: 1987-11-30
Abstract
Abstract REACTIVE DISAZO DYESTUFFS OF THE FORMULA 1-NH2,2-((2-(HO3S-),5-(Y-N(-A)-),X-PHENYL)-N=N-),3,6-DI (HO3S-),7-((2-(HO3S-),X-PHENYL)-N=N-),8-OH-NAPHTHALENE WHEREIN X IS HYDROGEN, SULFONIC ACID, HALO, NITRO, LOWER ALKYL OR LOWER ALKOXY; R IS HYDROGEN, ALKYL OR ARYL; Y IS HYDROGEN OR -CH3; AND A IS A REACTIVE HETEROCYCLIC RING (ESPECIALLY A REACTIVE PYRIMIDINE RING) WHICH DYESTUFFS ARE USEFUL IN DYEING CELLULOSE TO GIVE DYEINGS WITH GOOD LIGHT AND WET FASTNESS AND IN DYEING WOOL, SILK AND POLYAMIDE FIBERS.
Inventors
- 👤 K Schuendehuette
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:04
CPC Classifications
C; C09; C09B; C09B62/00; C09B62/002; C09B62/006; C09B62/01; C09B62/02; C09B62/022; C09B62/026; C09B62/03
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |