US3574750A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of cyclohexanone oxime
Assignee: Toagosei Co Ltd
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Filing: 1967-02-27
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Granted: 1971-04-13
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Expires: 1987-02-27
Abstract
Abstract A PROCESS FOR PRODUCING CYCLOHEXANONE OXIME BY THE OXIDATION OF CYCLOHEXANONE IN THE PRESENCE OF AMMONIA AND HYDROGEN PEROXIDE USING AS A CATALYST TUNGSTIC ACID, ISOPOLYTUNGSTIC ACID, HETEROPOLYTUNGSTIC ACID, OR A SALT THEREOF. THE OXIDATION IS CONDUCTED IN THE PRESENCE OF A SULFATE, PREFERABLY AT NORMAL PRESSURE AND AT A TEMPERATURE OF FROM 5-53*C. USING WATER AS THE MEDIUM TO PROMOTE THE REACTION. THE YIELD OF CYCLOHEXANONE OXIME IS ABOUT 95%.
Inventors
- 👤 Eizo Yasui
- 👤 Takeo Kawaguchi
- 👤 Takashi Matsubara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:16
CPC Classifications
C; C07; C07C; C07C251/00; C07C251/32; C07C251/34; C07C251/44; C07C249/00; C07C249/04; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
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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) | 1974-04-12 | 1974-10-12 | 1975-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-12 | 1978-10-12 | 1979-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-12 | 1982-10-12 | 1983-04-13 | $7700.00 | Window Closed / Lapsed |