US3575983A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substituted 1,2,3,4-tetrahydroisoquinolines
Assignee: F Hoffmann La Roche AG
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Filing: 1967-08-30
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Granted: 1971-04-20
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Expires: 1987-08-30
Abstract
Abstract NOVEL PHARMACOLOGICALLY ACTIVE 1,2,3,4-TETRAHYDRO-8ISOQUINOLINOL, 1- AND/OR 2-(LOWER ALKYL)-1,2,3,4-TETRAHYDRO-8-ISOQUINOLINOLS AND INTERMEDIATES THEREFOR, ARE PREPARED UTILIZING, FOR EXAMPLE, 8-ISOQUINOLINOL AS A STARTING MATERIAL. THE PHARMACOLOGICALLY ACTIVE COMPOUNDS OF THE INVENTION ARE USEFUL AS HYPOTENSIVE AGENTS.
Inventors
- 👤 Willy Leimgruber
- 👤 Fausto Eugenio Schenker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:05
CPC Classifications
C; C07; C07D; C07D217/00; C07D217/02; C07D217/04; C07D217/10
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) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |