US2822394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of cyclohexanone oxime
Assignee: Olin Corp
•
Filing: 1954-08-05
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Granted: 1958-02-04
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Expires: 1974-08-05
Abstract
No abstract record available.
Inventors
- 👤 Bernard H Nicolaisen
- 👤 Floro F Frulla
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:48
CPC Classifications
C; C07; C07C; C07C201/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A METHOD FOR RECOVERING CYCLOHEXANONE OXIME FROM SOLUTION IN A WATER-IMMISCIBLE ORGANIC HYDROCARBON SOLVENT, SAID SOLUTION CONTAINING CONTAMINANTS, WHICH COMPRISES CONTACTING THE SAID SOLUTION WITH A DILUTE, AQUEOUS, STRONG MINERAL ACID TO FORM A WATER-SOLUBLE SALT OF THE OXIME, SEPARATING THE RESULTING AQUEOUS PHASE CONTAINING THE WATER-SOLUBLE OXIME SALT, PARTLY NEUTRALIZING THE SEPARATED AQUEOUS PHASE WITH AMMONIA TO A PH OF ABOUT 2 TO 4 TO EFFECT SEPARATION OF THE OXIME FROM THE AQUEOUS PHASE AND RECOVERING THE SEPARATED OXIME, SAID OXIME BEING SUBSTANTIALLY FREE OF SAID CONTAMINANTS.
Claim 2
Independent Claim
88 words
A METHOD FOR RECOVERING CYCLOHEXANONE OXIME FROM SOLUTION IN A WATER-IMMISCIBLE ORGANIC HYDROCARBON SOLVENT, SAID SOLUTION CONTAINING CONTAMINANTS, WHICH COMPRISES CONTACTING THE SAID SOLUTION WITH A DILUTE, AQUEOUS, STRONG MINERAL ACID TO FORM A WATER-SOLUBLE SALT OF THE OXIME, SEPARATING THE RESULTING AQUEOUS PHASE CONTAINING THE WATER-SOLUBLE OXIME SALT, PARTLY NEUTRALIZING THE SEPARATED AQUEOUS PHASE WITH AMMONIA TO A PH OF ABOUT 2 TO 4 TO EFFECT SEPARATION OF THE OXIME FROM THE AQUEOUS PHASE AND RECOVERING THE SEPARATED OXIME, SAID OXIME BEING SUBSTANTIALLY FREE OF SAID CONTAMINANTS.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-02-03 | 1961-08-05 | 1962-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-03 | 1965-08-05 | 1966-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-03 | 1969-08-05 | 1970-02-04 | $7700.00 | Window Closed / Lapsed |