US3772299A
Expired / Lapsed
US
⏱️ 0.0 years remaining
P'-alkoxy-ergotamines
Assignee: Sandoz AG
•
Filing: 1971-05-25
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Granted: 1973-11-13
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Expires: 1991-05-25
Abstract
Abstract THE PRESENT INVENTION CONCERNS NEW COMPOUNDS OF THE FORMULA: P''-(R-O-)ERGOTAMINE WHEREIN R IS LOWER ALKYL OF 1 TO 4 CARBON ATOMS, AND THEIR PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS. THE COMPOUNDS AND THEIR PHARMACEUTICALLY ACCEPTABLE ACID ADDITION SALTS ARE USEFUL IN PROMOTING UTERUS CONTRACTIONS. FURTHERMORE, THEY ARE USEFUL IN THE TREATMENT OF MIGRAINE TYPE HEADACHES AND CIRCULATORY DISORDERS.
Inventors
- 👤 P Stadler
- 👤 P Stuetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:48
CPC Classifications
C; C07; C07D; C07D519/00; C07D519/02
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) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |