US3736319A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Novel cyclopentanone-2-carboxylates
Assignee: Sanofi Aventis France
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Filing: 1971-04-28
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Granted: 1973-05-29
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Expires: 1991-04-28
Abstract
Abstract NOVEL ALKYL 3-(3'' - OR - TRANS 1''-ALKENYL)-CYCLOPENTANONE-2-CARBOXYLATES OF THE FORMULA 2-(ALK-OOC-),3-(CH3-(CH2)M-CH(-O-R)-CH=CH-)CYCLOPENTAN-1- ONE WHEREIN ALK IS ALKYL OF 1 TO 7 CARBON ATOMS, R IS SELECTED FROM THE GROUP CONSISTING OF HYDROGEN, ACYL OF AN ORGANIC CARBOXYLIC ACID OF 1 TO 18 CARBON ATOMS AND A-TETRAHYDROPYRANYL AND M IS 3, 4 OR 5 WHICH ARE INTERMEDIATES FOR PROSTAGLANDINS AND THEIR PREPARATION AND NOVEL INTERMEDIATES.
Inventors
- 👤 J Martel
- 👤 E Toromanoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:59
CPC Classifications
C; C07; C07D; C07D231/00; C07D231/02; C07D231/10; C07D231/12; C07C; C07C405/00; C07D233/00; C07D233/54; C07D233/56; C07D249/00; C07D249/02; C07D249/08; C07D303/00; C07D303/02; C07D303/38; C07D303/40; C07D303/42; C07D309/00; C07D309/02; C07D309/08; C07D309/10; C07D309/12
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |