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US3562271A
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US
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3-cycloamino-1,2,8,9-tetraazaphenalenes
Assignee: Novartis Corp
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Filing: 1969-03-24
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Granted: 1971-02-09
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Expires: 1989-03-24
Abstract
Abstract 3-CYCLOAMINO-1,2,8,9-TETRAAZAPHENALENES OPTIONALLY SUBSTITUTED IN THE 4,5,6,7 AND/OR 9 POSITIONS AND THEIR SALTS ARE CARDIOVASCULAR AGENTS AND CAN BE PREPARED FROM THE CORRESPONDING 1,2,8,9-TETRAAZAPHENALENES. A REPRESENTATIVE EMBODIMENT IS 3-(-PIPERIDINO-1,2,8-9-TETRA AZAPHENALENE.
Inventors
- 👤 Karl J Doebel
- 👤 John E Francis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 04:11
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/06; C07D307/00; C07D307/77; C07D307/87; C07D307/89
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |