US2939819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
21-alkyl-17beta-hydroxy-17alpha-pregn-20-ynes, therapeutic compositions comprising same, and process therefor
Assignee: BDH Chemicals Ltd
•
Filing: 1958-01-21
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Granted: 1960-06-07
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Expires: 1978-01-21
Abstract
No abstract record available.
Inventors
- 👤 Barton Suzanne Patricia
- 👤 Burn Derek
- 👤 Cooley George
- 👤 Ellis Bernard
- 👤 Petrow Vladimir
- 👤 Stuart-Webb Isobel Ann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:53
CPC Classifications
C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 0
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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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |