US2912446A
Expired / Lapsed
US
⏱️ 0.0 years remaining
delta1, 4-3, 20-diketo-11-oxygenated-17alpha-hydroxy-pregnadienes and 9-fluoro derivatives thereof
Assignee: Merck and Co Inc
•
Filing: 1955-01-14
•
Granted: 1959-11-10
•
Expires: 1975-01-14
Abstract
No abstract record available.
Inventors
- 👤 Lewis H Sarett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:44
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
5 words
A 9A-FLUORO-17A-HYDROXY-1,4-PREGNADIENE-3,20-DIONE OF THE FORMULA
Claim 2
Dependent Claim
5 words
A 9A-FLUORO-17A-HYDROXY-1,4-PREGNADIENE-3,20-DIONE OF THE FORMULA
References Cited (Backward Citations)
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Cited
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Cited
US2756179A
Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-09 | 1963-05-11 | 1963-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-09 | 1967-05-11 | 1967-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-09 | 1971-05-11 | 1971-11-10 | $7700.00 | Window Closed / Lapsed |