Patent US3699092A successfully refreshed from Google Patents.
US3699092A
Expired / Lapsed
US
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Thiazolyl-monoazo-tetrahydroquinoline dyes
Assignee: Novartis Corp
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Filing: 1967-01-11
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Granted: 1972-10-17
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Expires: 1987-01-11
Abstract
Abstract WHEREIN R2 REPRESENTS HYDROGEN OR ALKYL, ARE USEFUL AS DYES FOR HYDROPHOBIC TEXTILE MATERIALS. -N(-R2)- WHEREIN Z REPRESENTS -NH-NH- OR A CHAIN OF CARBON ATOMS AND AT LEAST ONE OXYGEN OR SULFUR ATOM OR A GROUP HAVING THE FORMULA -N<(-CO-)2>Z THIAZOLYL-AZO-TETRAHYDROQUINOLINE COMPOUNDS, CONTAINING A CYCLIC GROUP OF THE FORMULA
Inventors
- 👤 Max A Weaver
- 👤 David J Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 03:30
CPC Classifications
C; C09; C09B; C09B29/00; C09B29/0025
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) | 1975-10-17 | 1976-04-17 | 1976-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-17 | 1980-04-17 | 1980-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-17 | 1984-04-17 | 1984-10-17 | $7700.00 | Window Closed / Lapsed |