US3778449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indenopyran-and indenothiopyran alkylamines
Assignee: Wyeth Canada Inc
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Filing: 1972-10-12
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Granted: 1973-12-11
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Expires: 1992-10-12
Abstract
Abstract INDENOPYRAN- AND INDENOTHIOPYRANALKYLAMINE DERIVATIVES CHARACTERIZED BY HAVING AN AMINO (LOWER) ALKYL RADICAL ATTACHED TO HE 1 POSITION OF A INDENO(2,1-C)PYRAN OR INDENO(2,1-C)THIOPYRAN NUCLEUS ARE DISCLOSED. THE AMINO PORTION OF THE AMINO(LOWER) ALKYL RADICAL MAY BE FURTHER SUBSTITUTED WITH ONE OR TWO LOWER ALKYL GROUPS OR INCORPORATED INTO A HETEROCYCLIC AMINE RADICAL. THE DERIVATIVES ARE FURTHER SUBSTITUTED AT POSITION 1 AND MAYBE OPTIONALLY SUBSTITUTED AT POSITIONS 3, 4, 5, 6, 7, 8, AND 9. THE INDENOPYRAN- AND INDENOTHIOPYRANALKYLAMINE DERIVATIVES OF THIS INVENTION ARE USEFUL ANTIDEPRESSANT AGENTS. METHODS FOR THEIR PREPARATION AND USE ARE DISCLOSED.
Inventors
- 👤 C Demerson
- 👤 T Dobson
- 👤 I Jirkovsky
- 👤 L Humber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:43
CPC Classifications
C; C07; C07C; C07C33/00; C07C33/38
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) | 1976-12-10 | 1977-06-11 | 1977-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-10 | 1981-06-11 | 1981-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-10 | 1985-06-11 | 1985-12-11 | $7700.00 | Window Closed / Lapsed |