US2702291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing 11alpha-hydroxy steroids
Assignee: Syntex SA
•
Filing: 1953-07-28
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Granted: 1955-02-15
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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
2026-11-01 17:28
CPC Classifications
C; C07; C07J; C07J7/00; C07J7/0005; C07J7/001; C07J7/004; C07J7/0045; C07J17/00; C07J7/0015; C07J7/002; C07J71/00; C07J71/0005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
31 words
A METHOD FOR THE PRODUCTION OF STEROIDAL 11AHYDROXY COMPOUNDS WHICH COMPRISES REDUCING THE CORRESPONDING STEROIDAL 11-KETO COMPOUNDS WITH AN ALKALI METAL IN AMMONIA SOLUTION AND IN THE PRESENCE OF AN ALCOHOL.
Claim 2
Independent Claim
31 words
A METHOD FOR THE PRODUCTION OF STEROIDAL 11AHYDROXY COMPOUNDS WHICH COMPRISES REDUCING THE CORRESPONDING STEROIDAL 11-KETO COMPOUNDS WITH AN ALKALI METAL IN AMMONIA SOLUTION AND IN THE PRESENCE OF AN ALCOHOL.
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) | 1958-02-14 | 1958-08-16 | 1959-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-02-14 | 1962-08-16 | 1963-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-02-14 | 1966-08-16 | 1967-02-15 | $7700.00 | Window Closed / Lapsed |