US3598829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Certain isoxazolylpyridines and isothiazolylpyridines
Assignee: Wyeth Holdings LLC
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Filing: 1969-11-10
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Granted: 1971-08-10
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Expires: 1989-11-10
Abstract
Abstract THIS APPLICATION DESCRIBES THE PREPARATION OF ISOXAZOLYLPYRIDINES AND ISOTHIAZOLYLPYRIDINES AS NEW COMPOUNDS AND ALSO THEIR USE IN PREPARING THE CORRESPONDING QUATERNARY ISOXAZOLYLPYRIDINIUM SALTS AND QUATERNARY ISOTHIAZOLYLPYRIDINIUM SALTS. THE QUATERNARY ISOXAZOLYLPYRIDINIUM SALTS AND QUATERNARY ISOTHIAZOLYLPYRIDINIUM SALTS ARE USEFUL FOR THEIR HYPOGLYCEMIC ACTIVITY.
Inventors
- 👤 Victor John Bauer
- 👤 Sidney Robert Safir
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:05
CPC Classifications
C; C07; C07D; C07D417/00; C07D417/02; C07D417/04; C07D401/00; C07D401/02; C07D401/04; C07D413/00; C07D413/02; C07D413/04
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) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |