US3344158A
Expired / Lapsed
US
⏱️ 0.0 years remaining
17alpha-(3', 3', 3'-trifluoroprop-1'-ynyl)-17beta-hydroxy and -alkoxy derivatives ofoestra-1, 3, 5(10)-triene and process for their preparation
Assignee: BDH Chemicals Ltd
•
Filing: 1965-04-01
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Granted: 1967-09-26
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Expires: 1985-04-01
Abstract
No abstract record available.
Inventors
- 👤 Feather Peter
- 👤 Petrow Vladimir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 20:36
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/56; A61K31/565; A61K31/567; C; C07; C07J; C07J1/00; C07J75/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
18 words
A PROCESS FOR THE PREPARATION OF A CORRESPONDING 17A-(3'',3'',3'' - TRIFLUOROPROP-1''-YNYL)-17B-HYDROXY DRIVATIVE OF AN OESTRA-1,3,5(10)-TIRENE OF THE FORMULA
Claim 2
Dependent Claim
18 words
A PROCESS FOR THE PREPARATION OF A CORRESPONDING 17A-(3'',3'',3'' - TRIFLUOROPROP-1''-YNYL)-17B-HYDROXY DRIVATIVE OF AN OESTRA-1,3,5(10)-TIRENE OF THE FORMULA
References Cited (Backward Citations)
US3253004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-09-25 | 1971-03-27 | 1971-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-25 | 1975-03-27 | 1975-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-25 | 1979-03-27 | 1979-09-26 | $7700.00 | Window Closed / Lapsed |