US2788353A
Expired / Lapsed
US
⏱️ 0.0 years remaining
11alpha-hydroxy-3, 20-diketo-pregnenes and allopregnenes unsaturated in ring a and process
Assignee: Syntex SA
•
Filing: 1953-03-06
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Granted: 1957-04-09
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Expires: 1973-03-06
Abstract
No abstract record available.
Inventors
- 👤 Djerassi Carl
- 👤 Rosenkranz George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 02:17
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
32 words
A NEW COMPOUND SELECTED FROM THE CLASS CONSISTING OF $1-ALLOPREGNEN-11A-OL-3,20-DIONE, LOWER FATTY ACIDS ESTERS THEREOF, THE BENZOIC ACID ESTER THEREOF, $1,4,16-PREGNATRIEN11A-OL-3,20-DIONE, LOWER FATTY ACID ESTERS THEREOF AND THE BENZOIC ACID ESTER THEREOF.
References Cited (Backward Citations)
US2369065A
Cited
US2602769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-04-08 | 1960-10-08 | 1961-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-08 | 1964-10-08 | 1965-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-08 | 1968-10-08 | 1969-04-09 | $7700.00 | Window Closed / Lapsed |