Patent EP0130028A2 successfully refreshed from Google Patents.
Patent US3755370A successfully refreshed from Google Patents.
US3755370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
2-substituted-4-propargyloxymethyl-ypsilon-butyrolactones
Assignee: Synthelabo SA
•
Filing: 1969-08-22
•
Granted: 1973-08-28
•
Expires: 1989-08-22
Abstract
Abstract A COMPOUND OF THE FORMULA: 2-(O=),3-R,5-(HC*C-CH2-O-CH2-)TETRAHYDROFURAN IN WHICH R IS HYDROGEN, ALKYL HAVING 1 TO 10 CARBON ATOMS ARYL ALIPHATIC IN WHICH THE ARYL CAN BE SUBSTITUTED BY ONE OR MORE HALOGENS, ONE OR MORE ALKOXY, ALIPHATIC HAVING 1 TO 4 CARBON ATOMS OR TRIFLUOROMETHYL. THE COMPOUND IS FORMED BY SAPONIFYING AND THEN DECARBOXYLATING THE CORRESPONDING 2-ETHOXYCARBONYL DERIVATIVE. THE COMPOUNDS POSSESS ANXIOLYTIC, ANTI-DEPRESSIVE, ANALGESIC AND RESPIRATORY STIMULATING PROPERTIES.
Inventors
- 👤 C Fauran
- 👤 G Raynaud
- 👤 C Douzon
- 👤 J Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:06
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/02; C07D307/26; C07D307/30; C07D307/32; C07D307/33
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) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |