Patent US3576009A successfully refreshed from Google Patents.
US3576009A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Amphetamine derivatives
Assignee: USV Pharmaceutical Corp
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Filing: 1968-04-02
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Granted: 1971-04-20
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Expires: 1988-04-02
Abstract
Abstract DERIVATIVES OF AMPHETAMINE OBTAINED BY THE REACTION OF AMPHETAMINE WITH 2-ACYLLACTONE OR A B-KETO-ESTER OR THE COMPOUND OBTAINED UPON HYDROGENATION OF THE LACTONE REACTION PRODUCT ARE POTENT APPETITE DEPRESSANTS BUT DO NOT SHOW THE CNS ACTIVITY OF AMPHETAMINE.
Inventors
- 👤 Ernest Magnien
- 👤 Bill Elpern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:47
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33; C07D307/34; C07D307/56; C07D307/66
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 |