US3694332A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrolytic reduction of halogenated pyridines
Assignee: Dow Chemical Co
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Filing: 1971-03-05
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Granted: 1972-09-26
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Expires: 1991-03-05
Abstract
Abstract HALOGENATED PYRIDINES OF THE FORMULA 2,6-DI(Y-),3,4,5-TRI(X-)PYRIDINE WHEREIN EACH X IS C1 OR BR, AND EACH Y IS X OR CN ARE ELECTROLYTICALLY REDUCED TO REPLACE THE HALIGEN IN THE 4 POSITION WITH HYDROGEN.
Inventors
- 👤 Vernon D Parker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:46
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/61
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) | 1975-09-26 | 1976-03-27 | 1976-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-26 | 1980-03-27 | 1980-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-26 | 1984-03-27 | 1984-09-26 | $7700.00 | Window Closed / Lapsed |