US2900382A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making delta4,6 steroid compounds from delta4 steroid compounds
Assignee: Syntex SA
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Filing: 1953-06-25
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Granted: 1959-08-18
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Expires: 1973-06-25
Abstract
No abstract record available.
Inventors
- 👤 Sondheimer Franz
- 👤 Rosenkranz George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:08
CPC Classifications
C; C07; C07J; C07J1/00; C07J1/0003; C07J1/0018; C07J1/0022; C07J1/0011; C07J13/00; C07J13/005; C07J5/00; C07J5/0007; C07J5/0015; C07J7/00; C07J7/0005; C07J7/001; C07J7/0015; C07J7/002; C07J7/0065; C07J71/00; C07J71/0005; C07J9/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
90 words
A PROCESS FOR THE PRODUCTION OF A STEROIDAL COMPOUND SELECTED FROM THE CLASS CONSISTING OF A $4,6-3-KETO CHOLESTADIENE, A $4,6-3-KETO PREGNADIENE, A $J, 6-3-KETO ANDROSTADIENE AND A $4,6-3-KETO SPIROSTADIENE WHICH COMPRISES HEATING WITH MANGANESE DIOXIDE IN AN ORGANIC SOLVENT AND UNDER REFLUX CONDITIONS A CORRESPONDING COMPOUND SELECTED FROM THE CLASS CONSISTING OF A $4-3-KETO CHOLESTENE, A $4-3-KETO CHOLESTENE OF A $5-3-HYDROXY CHOLESTENE, A $4-3-KETO PREGNENE, A $4-3-HYDROXY PREGNENE, A $5-3-HYDROXY PREGNENE, A $4-3-DETO ANDROSTENE, A $4-3-HYDROXY ANDROSTENE, A $5-3-HYDROXY ANDROSTENE, A $4-3-KETO SPIROSTENE, A $4-3-HYDROXY SPIROSTENE AND A $5-3-HYDROXY SPIROSTENE.
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) | 1962-08-17 | 1963-02-16 | 1963-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-17 | 1967-02-16 | 1967-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-17 | 1971-02-16 | 1971-08-18 | $7700.00 | Window Closed / Lapsed |