US2579479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
delta 1, 4-pregnadiene-17alpha-ol-3-ones
Assignee: Syntex SA
•
Filing: 1950-01-23
•
Granted: 1951-12-25
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Expires: 1970-01-23
Abstract
No abstract record available.
Inventors
- 👤 Djerassi Carl
- 👤 Berlin Juan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:47
CPC Classifications
C; C07; C07J; C07J75/00; A; A61; A61K; A61K31/00; A61K31/56; A61K31/57; C07J1/00; C07J5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
11 words
A NEW COMPOUND CONSISTING OF A $1,4-DIEN-3ONE OF THE 17A-HYDROXYPREGNANE SERIES.
Claim 2
Dependent Claim
11 words
A NEW COMPOUND CONSISTING OF A $1,4-DIEN-3ONE OF THE 17A-HYDROXYPREGNANE SERIES.
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) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |