US2744122A
Expired / Lapsed
US
⏱️ 0.0 years remaining
delta 4-19-nor-17alpha-ethinylandrosten-17beta-ol-3-one and process
Assignee: Syntex SA
•
Filing: 1952-11-12
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Granted: 1956-05-01
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Expires: 1972-11-12
Abstract
No abstract record available.
Inventors
- 👤 Djerassi Carl
- 👤 Miramontes Luis
- 👤 Rosenkranz George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:49
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
2 words
1 4-19-NOR-17A-ETHINYLANDROSTEN-17B-01-3-ONE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-01 | 1959-10-31 | 1960-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-01 | 1963-10-31 | 1964-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-01 | 1967-10-31 | 1968-05-01 | $7700.00 | Window Closed / Lapsed |