Patent US2979517A successfully refreshed from Google Patents.
US2979517A
Expired / Lapsed
US
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12alpha-fluoro-16alpha-hydroxy pregnenes
Assignee: Merck Sharp & Dohme LLC
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Filing: 1957-02-21
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Granted: 1961-04-11
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Expires: 1977-02-21
Abstract
No abstract record available.
Inventors
- 👤 Hershel L Herzog
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:08
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00; Y; Y10; Y10S; Y10S435/00; Y10S435/8215; Y10S435/822; Y10S435/826
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
19 words
COMPOUNDS OF THE GROUP CONSISTING OF 12A-FLURO-4PREGNENE-11B,16A,17A,21-TETROL - 3,20 - DIONE AND 12AFLURO-16A-HYDROXYPREDNISOLONE AND THEIR LOWER ALKONOIC ACID 21-ESTERS.
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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |