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US3816390A
Expired / Lapsed
US
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Benzothiazolyl-azo meta-acylamidoalkylene-aniline compounds
Assignee: Novartis Corp
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Filing: 1971-07-28
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Granted: 1974-06-11
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Expires: 1991-07-28
Abstract
Abstract R1, R2, R3, R4, R5 AND R6 ARE THE USUAL DYESTUFF SUBSTITUENTS. THE COMPOUNDS ARE PARTICULARLY USEFUL FOR DYEING POLYAMIDE FIBERS BRIGHT RED TO BLUISH-RED SHADES AND ON WHICH THE COMPOUNDS EXHIBIT IMPROVED FASTNESS TO LIGHT AND CROCKING AND IMPROVED MIGRATION PROPERTIES. BENZOTHIAZOLE 2-((4-(R6-CO-NH-R5-N(-R4)-),R3-PHENYL)-N=N-),R1,R2- MONOAZO COMPOUNDS HAVING A 2-BENZOTHIAZOLYL DIAZO COMPONENT AND AN ANILINE OR TETRAHYDROQUINOLINE COUPLING COMPONENT IN WHICH THE NITROGEN ATOM OF THE COUPLING COMPONENT BEARS A CARBOXYLIC ACYLAMIDOALKYL GROUP OF THE FORMULA
Inventors
- 👤 M Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:10
CPC Classifications
C; C07; C07D; C07D417/00; C07D417/02; C07D417/12; C09; C09B; C09B29/00; C09B29/06; C09B29/08; C09B29/34; C09B29/36; D; D06; D06P; D06P3/00; D06P3/02; D06P3/04; D06P3/24; D06P3/26
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |