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US3547935A
Expired / Lapsed
US
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Certain nitro-4-pyridinols,n-oxides thereof and derivatives thereof
Assignee: Wyeth Holdings LLC
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Filing: 1967-08-07
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Granted: 1970-12-15
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Expires: 1987-08-07
Abstract
No abstract record available.
Inventors
- 👤 Robert Eugene Diehl
- 👤 Bryant Leonidas Walworth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:47
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/62; C07D213/70; C07D213/72; C07D213/74; C07D213/89
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3409624A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-14 | 1974-06-15 | 1974-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-14 | 1978-06-15 | 1978-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-14 | 1982-06-15 | 1982-12-15 | $7700.00 | Window Closed / Lapsed |