Patent US2787624A successfully refreshed from Google Patents.
US2787624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for converting delta4-3-keto-6-oxy pregnenes to delta4-3-keto pregnenes
Assignee: Merck and Co Inc
•
Filing: 1952-12-18
•
Granted: 1957-04-02
•
Expires: 1972-12-18
Abstract
No abstract record available.
Inventors
- 👤 Louis F Fieser
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:12
CPC Classifications
C; C07; C07J; C07J9/00; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
42 words
THE PROCESS WHICH COMPRISES INTIMATELY CONTACTING A STEROID FROM THE GROUP CONSISTING OF $4-3KETO-6-HYDROXY PREGNENES AND $4-3-KEOT-6-ACYLOXY PREGNENS WHEREIN THE ACYL GROUP IS A LOWE FATTY ACID RADICAL, WITH ZINC IN THE PRESENCE OF AN ACID TO PRODUCE THE CORRESPONDING $4-3KETO PREGNENE.
Claim 2
Dependent Claim
42 words
THE PROCESS WHICH COMPRISES INTIMATELY CONTACTING A STEROID FROM THE GROUP CONSISTING OF $4-3KETO-6-HYDROXY PREGNENES AND $4-3-KEOT-6-ACYLOXY PREGNENS WHEREIN THE ACYL GROUP IS A LOWE FATTY ACID RADICAL, WITH ZINC IN THE PRESENCE OF AN ACID TO PRODUCE THE CORRESPONDING $4-3KETO PREGNENE.
References Cited (Backward Citations)
US2520656A
Cited
GB612129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |