US3042670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Selective reduction of steroidal dienones
Assignee: Merck Sharp & Dohme LLC
•
Filing: 1961-06-13
•
Granted: 1962-07-03
•
Expires: 1981-06-13
Abstract
No abstract record available.
Inventors
- 👤 Elliot L Shapiro
- 👤 Eugene P Oliveto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:54
CPC Classifications
C; C07; C07J; C07J5/00; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
58 words
A PROCESS FOR PREPARING A 3-KETO-$4-STEROID WHICH COMPRISES REACTING A 3-KETO-$1,4-STEROID WITH AN ANHYDROUS REDUCING MEDIUM COMPRISING A METAL SELECTED FROM THE GROUP CONSISTING OF AN ALKALI AND AN ALKALINE EARTH METAL HAVING AN ATOMIC WEIGHT LESS THAN 41, AND A SOLVENT SELECTED FROM THE GROUP CONSISTING OF LOWER PRIMARY ALIPHATIC AMINES, LOWER SECONDARY ALIPHATIC AMINES, AND AMMONIA.
Claim 2
Dependent Claim
58 words
A PROCESS FOR PREPARING A 3-KETO-$4-STEROID WHICH COMPRISES REACTING A 3-KETO-$1,4-STEROID WITH AN ANHYDROUS REDUCING MEDIUM COMPRISING A METAL SELECTED FROM THE GROUP CONSISTING OF AN ALKALI AND AN ALKALINE EARTH METAL HAVING AN ATOMIC WEIGHT LESS THAN 41, AND A SOLVENT SELECTED FROM THE GROUP CONSISTING OF LOWER PRIMARY ALIPHATIC AMINES, LOWER SECONDARY ALIPHATIC AMINES, AND AMMONIA.
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) | 1965-07-02 | 1966-01-01 | 1966-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-02 | 1970-01-01 | 1970-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-02 | 1974-01-01 | 1974-07-03 | $7700.00 | Window Closed / Lapsed |