US3829432A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the oxidation of quinoline
Assignee: Labofina SA
•
Filing: 1973-04-02
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Granted: 1974-08-13
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Expires: 1993-04-02
Abstract
Abstract A PROCESS FOR THE OXIDATION OF QUINOLINE INTO QUINOLINIC ACID WHICH COMPRISES REACTING QUINOLINE WITH A COBALT SALT IN A MOLAR RATIO OF QUINOLINE TO COBALT SALT LOWER THAN 2, WHILE MAINTAINING A CONCENTRATION OF COBALTIC IONS SUCH THAT 2X-A IS BETWEEN 0.1 AND 1.5, X AND A BEING RESPECTIVELY THE MOLARITY OF SAID COBALTIC IONS AND SAID COBALT SALT IN THE REACTION MIXTURE, SUCH REACTION BEING CARRIED OUT AT A TEMPERATURE BETWEEN 40 AND 150*C. IN THE PRESENCE OF AN ALIPHATIC CARBOXYLIC ACID HAVING FROM 2 TO 4 CARBON ATOMS AND IN THE PRESENCE OF MOLECULAR OXYGEN AT A PARTIAL PRESSURE OF FROM 0.2 TO 20 ATMOSPHERES.
Inventors
- 👤 J Hanotier
- 👤 Bridoux M Hanotier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:34
CPC Classifications
C; C07; C07D; C07D213/00; C07D213/02; C07D213/04; C07D213/60; C07D213/78; C07D213/79; C07D213/803; C07D213/80
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |