US3711515A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tricyclic lactone alkene or alkenyne
Assignee: Pharmacia and Upjohn Co
•
Filing: 1971-09-16
•
Granted: 1973-01-16
•
Expires: 1991-09-16
Abstract
Abstract TRICYCLIC LACTONE ALKENES OR ALKENYNES OF THE FORMULA: 2-(O=),4-(Y-CH=CH-)PERHYDROCYCLOPROPA(3,4)CYCLOPENTA(1,2-B)FURAN WHEREIN Y IS 1-PENTYL OR PENTYL-2-YNYL, AND $ INDICATES ATTACHMENT OF THE MOIETY TO THE CYCLOPROPANE RING IN EXOOR ENDO CONFIGURATION ARE USEFUL AS INTERMEDICATES IN PREPARING PROSTAGLANDINS HAVING PHARMACEUTICAL UTILITY.
Inventors
- 👤 R Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:15
CPC Classifications
C; C07; C07D; C07D263/00; C07D263/02; C07D263/04; C07C; C07C405/00; C07D307/00; C07D307/77; C07D307/93; C07D307/935; C07D317/00; C07D317/08; C07D317/10; C07D317/12; C07D317/14; C07D317/26; C07D319/00; C07D319/04; C07D319/06; C07D319/10; C07D319/14; C07D319/16
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |