US3631049A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bis-tetrahydroquinoline methine compounds
Assignee: Novartis Corp
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Filing: 1969-12-04
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Granted: 1971-12-28
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Expires: 1989-12-04
Abstract
Abstract METHINE DYE COMPOUNDS HAVING THE GENERAL FORMULA 1-((2-Q,2-Q1,4-Q2,6-((NC-)2-C=CH-),R6-1,2,3,4-TETRAHYDRO QUINOL-1-YL)-R3-OOC-NH-R4-NH-COO-R''3-),2-Q,2-Q1,4-Q2, 6-((NC-)2-C=CH-),R''6-1,2,3,4-TETRAHYDROQUINOLINE WHEREIN Q, Q1 AND Q2 EACH IS HYDROGEN OR METHYL; R3 AND R''3 EACH IS LOWER ALKYLENE; R4 IS ALKYLENE, METHYLENEDIPHENYLENE, ARYLENE OR CYCLOHEXYLENEDIMETHYLENE; AND R6 AND R''6 EACH IS HYDROGEN, ALKYL, ALKOXY OR HALOGEN. THE DISCLOSED COMPOUNDS ARE USEFUL AS DYES FOR HYDROPHOBIC TEXTILE MATERIALS SUCH AS POLYESTER FIBERS ON WHICH THE COMPOUNDS EXHIBIT IMPROVED RESISTANCE TO SUBLIMATION.
Inventors
- 👤 James M Straley
- 👤 David J Wallace
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:32
CPC Classifications
C; C07; C07C; C07C255/00; C09; C09B; C09B23/00; C09B23/0008; C09B23/005; C09B23/0058
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |