Patent US3590035A successfully refreshed from Google Patents.
US3590035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing pyridine n-oxide carbanion salts
Assignee: Procter and Gamble Co
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Filing: 1967-12-21
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Granted: 1971-06-29
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Expires: 1987-12-21
Abstract
Abstract PROCESS FOR PREPARING 2-PYRIDINE N-OXIDE CARBANION SALTS, 2-PYRIDINETHIOL N-OXIDES, SALTS THEREOF AND 2,2''-DITHIOPYRIDINE N,N-DIOXIDES WHICH COMPRISES THE STEPS OF (I) REACTING A PYRIDINE N-OXIDE WITH A STRONG BASE AT FROM -70* TO 150*C. TO FORM A NOVEL PYRIDINE N-OXIDE CARBANION SALT AND (2) REACTING THE CARBANION SALT FORMED WITH A SULFUR-CONTAINING REAGENT.
Inventors
- 👤 Ralph A Damico
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:57
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/89
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) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |