Patent US3007923A successfully refreshed from Google Patents.
US3007923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the fluorination of 9beta, 11beta-epoxy and 5alpha, 6alpha-epoxy steroids
Assignee: Laboratoires Francais de Chimiotherapie SA
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Filing: 1960-01-12
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Granted: 1961-11-07
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Expires: 1980-01-12
Abstract
No abstract record available.
Inventors
- 👤 Muller Georges
- 👤 Bardoneschi Roland
- 👤 Jolly Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:18
CPC Classifications
C; C07; C07J; C07J5/00; C07J1/00; C07J21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
IN A PROCESS FOR CONVERTING A STEROID SELECTED FROM THE GROUP CONSISTING OF 9B,11B-EPOXY SATURATED AND UNSATURATED STEROIDS OF THE PREGNANE AND ANDROSTANE SERIES AND 5A,6A-EPOXY SATURATED AND UNSATURATED STEROIDS OF THE PREGNANE AND ANDROSTANE SERIES TO CORRESPONDING STEROIDS OF THE CLASS CONSISTING OF 9A-FLUORO-11B-HYDROXY AND 6BFLUORO-5A-HYDROXY SATURATED AND UNSATURATED STEROIDS OF THE PREGNANE AND ANDROSTANE SERIES BY REACTING THE EPOXY STEROIDS WITH HYDROFLUORIC ACID, THE IMPROVEMENT WHICH CONSISTS IN CONDUCTING THE REACTION WITH ABOUT EQUAL VOLUMES OF LIQUEFIED ANHYDROUS HYDROFLUORIC ACID AND DIMETHYLFORMAMIDE AT TEMPERATURES BETWEEN ABOUT -10* C. TO +10*C.
Claim 2
Dependent Claim
92 words
IN A PROCESS FOR CONVERTING A STEROID SELECTED FROM THE GROUP CONSISTING OF 9B,11B-EPOXY SATURATED AND UNSATURATED STEROIDS OF THE PREGNANE AND ANDROSTANE SERIES AND 5A,6A-EPOXY SATURATED AND UNSATURATED STEROIDS OF THE PREGNANE AND ANDROSTANE SERIES TO CORRESPONDING STEROIDS OF THE CLASS CONSISTING OF 9A-FLUORO-11B-HYDROXY AND 6BFLUORO-5A-HYDROXY SATURATED AND UNSATURATED STEROIDS OF THE PREGNANE AND ANDROSTANE SERIES BY REACTING THE EPOXY STEROIDS WITH HYDROFLUORIC ACID, THE IMPROVEMENT WHICH CONSISTS IN CONDUCTING THE REACTION WITH ABOUT EQUAL VOLUMES OF LIQUEFIED ANHYDROUS HYDROFLUORIC ACID AND DIMETHYLFORMAMIDE AT TEMPERATURES BETWEEN ABOUT -10* C. TO +10*C.
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) | 1964-11-06 | 1965-05-08 | 1965-11-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-11-06 | 1969-05-08 | 1969-11-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-11-06 | 1973-05-08 | 1973-11-07 | $7700.00 | Window Closed / Lapsed |