Patent US2823204A successfully refreshed from Google Patents.
US2823204A
Expired / Lapsed
US
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Alkaloids of voacanga
Assignee: GOBEY LAB
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Filing: 1956-03-30
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Granted: 1958-02-11
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Expires: 1976-03-30
Abstract
No abstract record available.
Inventors
- 👤 Janot Maurice-Marie
- 👤 Goutarel Robert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:16
CPC Classifications
C; C07; C07D; C07D519/00; C07D519/04; C07D491/00; C07D491/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
THE ALKALOIDS SELECTED FROM THE GROUP CONSISTING OF VOACAGINE, VOACAMINE, VOACAMININE, VOBRUSINE, AND THEIR ACID ADDITION SALTS, OBTAINED BY EXTRACTING PARTS OF PLANTS OF THE GENUS VOACAGNA WITH ETHANOL CONTAINING ACETIC ACID, REMOVING THE ETHANOL, TREATING THE RESIDUE WITH BENZENE, PASSING THE BENZENE SOLUTION THROUGH A CHROMATOGRAPHIC ADSORBING AGENT, AND FRACTIONALLY ELUTING SAID ALKALOID FROM SAID ADSORBING AGENT.
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) | 1961-02-10 | 1961-08-12 | 1962-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-10 | 1965-08-12 | 1966-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-10 | 1969-08-12 | 1970-02-11 | $7700.00 | Window Closed / Lapsed |