Patent US4378671A successfully refreshed from Google Patents.
Patent US3829441A successfully refreshed from Google Patents.
US3829441A
Expired / Lapsed
US
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Guanidinoalkylbenzodioxan derivatives
Assignee: Smith Kline & French Laboratories Ltd
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Filing: 1967-11-01
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Granted: 1974-08-13
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Expires: 1987-11-01
Abstract
Abstract THE PREPARATION OF A GROUP OF NEW COMPOUNDS HAVING ANTIHYPERTENSIVE ACTIVITY AND CHARACTERIZED BY BEING GUANIDINOALKYL-1,4-BEBENZODIOXANS. THE COMPOUNDS ARE MOST EASILY PREPARED BY REACTING A 2-AMINOALKYL-1,4-BENZODIOXANE WITH CYANAMIDE.
Inventors
- 👤 J Gardner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 15:49
CPC Classifications
C; C07; C07D; C07D319/00; C07D319/10; C07D319/14; C07D319/16; C07D319/20
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) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |