US3758466A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pyrrole methine cationic dyes
Assignee: Novartis Corp
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Filing: 1971-12-13
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Granted: 1973-09-11
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Expires: 1991-12-13
Abstract
Abstract COMPOUNDS OF THE FORMULA 1-R2,2-((1-R3,(Y)N-PYRROL-2-YL)-CH=CH-),3,3-DI(CH3-),R1- 3H-INDOLIUM A(-) WHEREIN R1 REPRESENTS HYDROGEN, HALOGEN, LOWER ALKYL, LOWER ALKOXY, OR ALKOXYCARBONYL; R2 REPRESENTS LOWER ALKYL, LOWER SUBSTITUTED ALKYL, OR ARYL; R3 REPRESENTS HYDROGEN, LOWER ALKYL, LOWER SUBSTITUTED ALKYL OR ARYL; Y REPRESENTS HYDROGEN, ALKYL, ALKOXY OR PHENYL; N IS 1, 2 OR 3; AND A IS A BASIC DYE ANION. THESE COMPOUNDS ARE USEFUL AS DYES FOR ACRYLIC, MODACRYLIC AND ACID-MODIFIED POLYESTER TEXTILE FIBERS, YARNS AND FABRICS.
Inventors
- 👤 J Fisher
- 👤 C Coates
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:27
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/10; C09B23/105; Y; Y10; Y10S; Y10S8/00; Y10S8/92; Y10S8/927
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |