US2461912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the degradation of the side-chain of a steroid containing a nuclear alpha, beta-unsaturated keto group
Assignee: CIBA PHARM PROD Inc
•
Filing: 1947-04-28
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Granted: 1949-02-15
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Expires: 1967-04-28
Abstract
No abstract record available.
Inventors
- 👤 Miescher Karl
- 👤 Frey Hugo
- 👤 Meystre Charles
- 👤 Wettstein Albert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:15
CPC Classifications
C; C07; C07J; C07J9/00; C07J75/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2153700A
Cited
US2239742A
Cited
GB544051A
Cited
US2307552A
Cited
US2376675A
Cited
US2398481A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-02-15 | 1952-08-16 | 1953-02-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-02-15 | 1956-08-16 | 1957-02-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-02-15 | 1960-08-16 | 1961-02-15 | $7700.00 | Window Closed / Lapsed |