US3705182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
16beta-difluoromethyl and 16-difluoromethylene steroids and processes for their preparation
Assignee: Roche Palo Alto LLC
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Filing: 1970-02-24
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Granted: 1972-12-05
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Expires: 1990-02-24
Abstract
Abstract STEROIDS OF THE 16B-DIFLUOROMETHYL AND 16-DIFLUOROMETHYLENE PREGNANE SERIES ARE DESCRIBED. THESE COMPOUNDS ARE USEFUL AS PROGESTATIONAL AND ANTI-INFLAMMATORY AGENTS. ALSO DESCRIBED ARE PROCESSES USEFUL FOR PREPARING THESE COMPOUNDS FROM CORRESPONDING $16 PREGNANE STARTING COMPOUNDS UTILIZING 16A-BENZENESULFONYLDIFLUOROMETHYL-20KETO, 16-DIFLUOROMETHYL-$16, 16A - BENZENESULFONYLDIFLUOROMETHYL-20-HYDROXY AND 16-DIFLUOROMETHYLENE-20-HYDROXY PREGNANE INTERMEDIATES.
Inventors
- 👤 John A Edwards
- 👤 John H Fried
- 👤 John S Mills
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 08:43
CPC Classifications
C; C07; C07J; C07J5/00; C07J75/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |