US2702297A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cyclopentanophenanthrene compounds and process
Assignee: Syntex SA
•
Filing: 1952-05-16
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Granted: 1955-02-15
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Expires: 1972-05-16
Abstract
No abstract record available.
Inventors
- 👤 Romo Jesus
- 👤 Rosenkranz George
- 👤 Djerassi Carl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:52
CPC Classifications
C; C07; C07J; C07J31/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
A PROCESS FOR THE PRODUCTION OF 16-SATURATED STEROIDS OF THE PREGNENE SERIES FROM CORRESPONDING 16DEHYDROSTERIODS OF THE PREGENE SERIES WHICH COMPRISES REACTING SAID 16-DEHYDROSTEROID WITH A MERCAPTAN IN THE PRESENCE OF A CATALYST TO FORM THE CORRESPONDING 16-THIOSTEROID AND REFLUXING SAID 16-THIOSTEROID IN THE PRESENCE OF RANEY NICKEL CATALYST.
Claim 2
Dependent Claim
49 words
A PROCESS FOR THE PRODUCTION OF 16-SATURATED STEROIDS OF THE PREGNENE SERIES FROM CORRESPONDING 16DEHYDROSTERIODS OF THE PREGENE SERIES WHICH COMPRISES REACTING SAID 16-DEHYDROSTEROID WITH A MERCAPTAN IN THE PRESENCE OF A CATALYST TO FORM THE CORRESPONDING 16-THIOSTEROID AND REFLUXING SAID 16-THIOSTEROID IN THE PRESENCE OF RANEY NICKEL CATALYST.
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 |