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US2751379A
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Preparation of steroidal 11alpha-hydroxy compounds
Assignee: Syntex SA
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Filing: 1953-07-28
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Granted: 1956-06-19
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Expires: 1973-07-28
Abstract
No abstract record available.
Inventors
- 👤 Sondheimer Franz
- 👤 Djerassi Carl
- 👤 Rosenkranz George
- 👤 Mancera Octavio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:05
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
40 words
A METHOD FOR THE PRODUCTION OF STEROIDAL 11A-HYDROXY COMPOUNDS WHICH COMPRISES TREATING THE CORRESPONDING STEROIDAL 11-KETO COMPOUNDS WITH SODIUM METAL IN THE PRESENCE OF AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF LOWER ALCOHOL SOLVENTS AND MOIST ORGANIC SOLVENTS.
Claim 2
Independent Claim
40 words
A METHOD FOR THE PRODUCTION OF STEROIDAL 11A-HYDROXY COMPOUNDS WHICH COMPRISES TREATING THE CORRESPONDING STEROIDAL 11-KETO COMPOUNDS WITH SODIUM METAL IN THE PRESENCE OF AN ORGANIC SOLVENT SELECTED FROM THE GROUP CONSISTING OF LOWER ALCOHOL SOLVENTS AND MOIST ORGANIC SOLVENTS.
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) | 1959-06-19 | 1959-12-19 | 1960-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-06-19 | 1963-12-19 | 1964-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-06-19 | 1967-12-19 | 1968-06-19 | $7700.00 | Window Closed / Lapsed |