Patent US3678062A successfully refreshed from Google Patents.
US3678062A
Expired / Lapsed
US
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Certain 4-/(indazol-3-yl)-pyridinium/compounds
Assignee: Wyeth Holdings LLC
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Filing: 1970-09-08
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Granted: 1972-07-18
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Expires: 1990-09-08
Abstract
Abstract Quaternary pyridinium salts are prepared by quaternizing the corresponding pyridine compounds which in turn are prepared by various methods. The quaternary salts are useful for lowering blood glucose in warm-blooded animals.
Inventors
- 👤 Victor John Rauer
- 👤 William Joseph Fanshawe
- 👤 Gretchen Ellen Wiegand
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:13
CPC Classifications
C; C07; C07D; C07D401/00; C07D401/02; C07D401/04; C07D405/00; C07D405/02; C07D405/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
10 words
The pyridine compound in accordance with claim 1, 1-methyl-4-(3-indazolyl)pyridinium iodide.
Claim 2
Dependent Claim
9 words
The pyridine compound in accordance with claim 1, 3-(4-pyridyl)indazole.
References Cited (Backward Citations)
US3598829A
Cited
US3574842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-18 | 1976-01-17 | 1976-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-18 | 1980-01-17 | 1980-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-18 | 1984-01-17 | 1984-07-18 | $7700.00 | Window Closed / Lapsed |