Patent US2677695A successfully refreshed from Google Patents.
US2677695A
Expired / Lapsed
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Process for preparing 17alpha-hydroxy 20-keto steroids
Assignee: Merck Sharp & Dohme LLC
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Filing: 1951-05-29
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Granted: 1954-05-04
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Expires: 1971-05-29
Abstract
No abstract record available.
Inventors
- 👤 Eugene P Oliveto
- 👤 Emanuel B Hershberg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:41
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
PROCESS FOR THE MANUFACTURE OF SATURATED 10,13-DIMETHYL-17-HYDROXY STEROIDS WHICH COMPRISES REACTING AN ENOL ESTER OF A 10,13-DIMETHYL20-KETO STEROID WITH A PERACID IN A MULTIPHASE REACTION MEDIUM COMPRISING A NEUTRAL ORGANIC SOLVENT FOR THE STEROID COMPOUND, AND A SECOND SOLVENT WHICH IS AT MOST ONLY PARTIALLY MISCIBLE WITH THE FIRST-NAMED SOLVENT, SAID SECOND SOLVENT BEING COMPOSED AT LEAST IN PART OF WATER, AND RECOVERING THE 17-HYDROXY STEROID FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
70 words
PROCESS FOR THE MANUFACTURE OF SATURATED 10,13-DIMETHYL-17-HYDROXY STEROIDS WHICH COMPRISES REACTING AN ENOL ESTER OF A 10,13-DIMETHYL20-KETO STEROID WITH A PERACID IN A MULTIPHASE REACTION MEDIUM COMPRISING A NEUTRAL ORGANIC SOLVENT FOR THE STEROID COMPOUND, AND A SECOND SOLVENT WHICH IS AT MOST ONLY PARTIALLY MISCIBLE WITH THE FIRST-NAMED SOLVENT, SAID SECOND SOLVENT BEING COMPOSED AT LEAST IN PART OF WATER, AND RECOVERING THE 17-HYDROXY STEROID FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2554986A
Cited
US2562030A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |