US3829411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thiadiazolyl-azo-indole compounds
Assignee: Novartis Corp
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Filing: 1972-03-29
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Granted: 1974-08-13
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Expires: 1992-03-29
Abstract
Abstract AZO COMPOUNDS HAVING THE GENERAL FORMULA 1-R2,2-R1,3-(T-N=N-),R3-INDOLE IN WHICH T IS A DISPERSE DYE 1,3,4-THIADIAZOL-2-YL OR 1,3,5THIADIAZOL-2-YL DIAZO COMPONENT; R1 IS ARYL; R2 IS HYDROGEN, ALKYL, CYANOALKYL, UNSUBSTITUTED OR SUBSTITUTED CARBAMOYLALKYL OR ACYLAMIDOALKYL; AND R3 IS HYDROGEN ALKL, ALKOXY OR HALOGEN. THE COMPOUNDS ARE USEFUL FOR DYEING CELLULOSE ACETATE, POLYESTER AND, ESPECIALLY. POLYAMIDE FIBERS ON WHICH THE COMPOUNDS PRODUCE YELLOW TO ORANGE SHADES AND EXHIBIT GOOD DYEABILITY AND FASTNESS TO LIGHT AND WASHING.
Inventors
- 👤 C Coates
- 👤 M Weaver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:14
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/34; C09B29/36; C09B29/3604; C09B29/3608; C09B29/3613; Y; Y10; Y10S; Y10S8/00; Y10S8/929
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |