US2686793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reduction of 11-ketoprogesterone to 3beta-hydroxyallopregnane-11, 20-dione
Assignee: Pharmacia and Upjohn Co
•
Filing: 1953-03-02
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Granted: 1954-08-17
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Expires: 1973-03-02
Abstract
No abstract record available.
Inventors
- 👤 Barney J Magerlein
- 👤 Robert H Levin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:15
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
A PROCESS FOR THE PRODUCTION OF 3B-HYDROXYALLOPREGNANE-11,20-DIONE WHICH COMPRISES: HYDROGENATING 11-KETOPROGESTERONE IN AN ORGANIC SOLVENT WITH HYDROGEN AT A PRESSURE BETWEEN ABOUT TWO AND SEVENTY POUNDS PER SQUARE INCH, IN THE PRESENCE OF A PLATINUM CATALYST, UNTIL ABOUT TWO MOLES OF HYDROGEN IS ABSORBED, TO OBTAIN 3BHYDROXYALLOPREGNANE-11,20-DIONE.
Claim 2
Dependent Claim
47 words
A PROCESS FOR THE PRODUCTION OF 3B-HYDROXYALLOPREGNANE-11,20-DIONE WHICH COMPRISES: HYDROGENATING 11-KETOPROGESTERONE IN AN ORGANIC SOLVENT WITH HYDROGEN AT A PRESSURE BETWEEN ABOUT TWO AND SEVENTY POUNDS PER SQUARE INCH, IN THE PRESENCE OF A PLATINUM CATALYST, UNTIL ABOUT TWO MOLES OF HYDROGEN IS ABSORBED, TO OBTAIN 3BHYDROXYALLOPREGNANE-11,20-DIONE.
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) | 1957-08-16 | 1958-02-15 | 1958-08-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-16 | 1962-02-15 | 1962-08-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-16 | 1966-02-15 | 1966-08-17 | $7700.00 | Window Closed / Lapsed |