Patent US2878283A successfully refreshed from Google Patents.
US2878283A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for recovering acetic acid
Assignee: Individual
•
Filing: 1957-01-23
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Granted: 1959-03-17
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Expires: 1977-01-23
Abstract
No abstract record available.
Inventors
- 👤 Donald F Othmer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:15
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
49 words
THE PROCESS OF RECOVERING AETIC ACID FROM ITS AQUEOUS SOLUTIONS CONTAINING ALSO AT LEAST ONE PART DISSOLVED SOLIDS FOR EACH TEN PARTS OF WATER COMPRISING EXTRACTING WITH A SOLVENT MIXTURE CONTAINING ACETONE AND FROM 10% TO 60% OF AN ETHER HAVING A NORMAL BOILING POINT BETWEEN 30*C. AND 100*C.
Claim 2
Dependent Claim
49 words
THE PROCESS OF RECOVERING AETIC ACID FROM ITS AQUEOUS SOLUTIONS CONTAINING ALSO AT LEAST ONE PART DISSOLVED SOLIDS FOR EACH TEN PARTS OF WATER COMPRISING EXTRACTING WITH A SOLVENT MIXTURE CONTAINING ACETONE AND FROM 10% TO 60% OF AN ETHER HAVING A NORMAL BOILING POINT BETWEEN 30*C. AND 100*C.
References Cited (Backward Citations)
US2744927A
Cited
US2714118A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |