US3557087A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthesis of steroids
Assignee: ER Squibb and Sons LLC
•
Filing: 1967-11-29
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Granted: 1971-01-19
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Expires: 1987-11-29
Abstract
Abstract WHEREIN N REPRESENTS 1 OR 3. THE B-LACTAMS OF THIS INVENTION ARE PHYSIOLOGICALLY ACTIVE MATERIALS POSSESSING ANTIANDROGENIC ACTIVITY. 7A-CH3-HEXAHYDROINDAN-5,4-YLENE)-(CH2)N-) CH2<(-(2-CH3,4-(O=)AZETIDIN-1,2-YLENE)-(1-(CH3-CO-), THIS INVENTION RELATES TO THE PREPARATION OF NOVEL STEROIDAL B-LACTAMS HAVING THE FORMULA:
Inventors
- 👤 Seymour D Levine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:36
CPC Classifications
C; C07; C07D; C07D463/00; Y; Y10; Y10S; Y10S516/00; Y10S516/01; Y10S516/07
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |