US2813873A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Derivatives of the ibogaine alkaloids
Assignee: —
•
Filing: —
•
Granted: 1957-11-19
•
Expires: 1974-11-19
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:57
CPC Classifications
C; C07; C07D; C07D487/00; C07D487/02; C07D487/04; C07D471/00; C07D471/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE METHOD OF PRODUCING IBOGAINE WHICH CONSISTS IN HEATING A SUBSTANCE CONTAINING VOACANGINE IN A LOWER ALCOHOL ALKALINE SOLUTION AT A TEMPERATURE APPROXIMATING BOILING, THEN HEATING WITH AN ACID MEDIUM AT A TEMPERATURE BETWEEN 35*-55*C., THEN CONVERTING THE RESULTANT IBOGAINE HYDROCHLORIDE INTO A BASE IBOGAINE, REFLUXING THE LAST NAMED PRODUCT WITH A HYDROHALOGEN ACID IN THE PRESENCE OF AN ACID TO DEMETHYLATE SAID PRODUCT, WASHING TO ISOLATE O-DEMETHYL IBOGAINE HYDROCHLORIDE, ALKALINIZING SAID LAST PRODUCT THEN TREATING WITH P-TOLUENE SULFONYL CHLORIDE TO OBTAIN THE CORRESPONDING P-TOLUENE SULFONATE.
Claim 2
Dependent Claim
9 words
AS A NEW PRODUCT, O-P-TOLUENE SULFONATE HYDROCHLORIDE OF O-DEMETHYL-IBOGAINE.
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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |