Patent US3752819A successfully refreshed from Google Patents.
US3752819A
Expired / Lapsed
US
⏱️ 0.0 years remaining
5-phenyl-isoxazole-3-carboxylic acids and their derivatives
Assignee: Ferlux SA
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Filing: 1970-12-02
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Granted: 1973-08-14
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Expires: 1990-12-02
Abstract
Abstract NEW DERIVATIVES OF 5-PHENYL-ISOXAZOLE-3-CARBOXYLIC ACID OF THE GENERAL FORMULA 3-(R-CO-),5-(2-R1,3-R2,4-R3,5-R4,6-R5-PHENYL)-ISOXAZOLE IN WHICH R REPRESENTS A FREE OR ESTERIFIED HYDROXYLATED GROUP, AN AMINATED GROUP OR HYDRAZINE GROUP, THESE DERIVATIVES ARE PREPARED BY THE ACTION OF HYDROXLAMINE OR BENZOYLPYRUVIC ACIDS. THERAPEUTICAL APPLICATION OF THE DERIVATIVES OF THE INVENTION PARTICULARLY AS SALIDIURETICS, SEDATIVES, ANALGESICS.
Inventors
- 👤 J Philippe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:59
CPC Classifications
C; C07; C07D; C07D311/00; C07D311/02; C07D311/04; C07D311/22; C07D311/24; C07C; C07C59/00; C07C59/40; C07C59/76; C07C59/90; C07D261/00; C07D261/02; C07D261/06; C07D261/10; C07D261/18
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |