US2615912A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purifying synthetic oil-soluble carboxylic acids
Assignee: Stanolind Oil and Gas Co
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Filing: 1949-04-07
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Granted: 1952-10-28
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Expires: 1969-04-07
Abstract
No abstract record available.
Inventors
- 👤 Vesta F Michael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:17
CPC Classifications
C; C07; C07C; C07C51/00; C07C51/42; C07C51/43; C07C51/44
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
IN A PROCESS FOR SEPARATING AND PURIFYING OIL-SOLUBLE CARBOXYLIC ACIDS FROM AN AQUEOUS MIXTURE CONSISTING ESSENTIALLY OF CARBOXYLIC ACID SALTS DERIVED FROM ORGANIC ACIDS HAVING PREDOMINANTLY FROM 5 TO 18 CARBON ATOMS TO THE MOLECULE, THE STEPS WHICH COMPRISE LIBERATING THE CARBOXYLIC ACIDS FROM SAID CARBOXYLIC ACID SALTS, SEPARATELY RECOVERING A LIQUID CARBOXYLIC ACID PHASE CONTAMINATED WITH WATER-SOLUBLE INORGANIC IMPURITIES AND A LIQUID WATER PHASE CONTAINING INORGANIC IMPURITIES, STEAM STRIPPING SAID LIQUID WATER PHASE, RECOVERING AN ACIDIC AQUEOUS STRIPPER OVERHEAD PRODUCT FREE OF INORGANIC IMPURITIES AND OF ACETIC ACID, AND WASHING THE SEPARATED LIQUID CARBOXYLIC ACID PHASE WITH THE STRIPPER OVERHEAD PRODUCT TO PRODUCE A WASHED CARBOXYLIC ACID STREAM SUBSTANTIALLY FREE OF INORGANIC IMPURITIES.
Claim 2
Dependent Claim
114 words
IN A PROCESS FOR SEPARATING AND PURIFYING OIL-SOLUBLE CARBOXYLIC ACIDS FROM AN AQUEOUS MIXTURE CONSISTING ESSENTIALLY OF CARBOXYLIC ACID SALTS DERIVED FROM ORGANIC ACIDS HAVING PREDOMINANTLY FROM 5 TO 18 CARBON ATOMS TO THE MOLECULE, THE STEPS WHICH COMPRISE LIBERATING THE CARBOXYLIC ACIDS FROM SAID CARBOXYLIC ACID SALTS, SEPARATELY RECOVERING A LIQUID CARBOXYLIC ACID PHASE CONTAMINATED WITH WATER-SOLUBLE INORGANIC IMPURITIES AND A LIQUID WATER PHASE CONTAINING INORGANIC IMPURITIES, STEAM STRIPPING SAID LIQUID WATER PHASE, RECOVERING AN ACIDIC AQUEOUS STRIPPER OVERHEAD PRODUCT FREE OF INORGANIC IMPURITIES AND OF ACETIC ACID, AND WASHING THE SEPARATED LIQUID CARBOXYLIC ACID PHASE WITH THE STRIPPER OVERHEAD PRODUCT TO PRODUCE A WASHED CARBOXYLIC ACID STREAM SUBSTANTIALLY FREE OF INORGANIC IMPURITIES.
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) | 1955-10-28 | 1956-04-28 | 1956-10-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-10-28 | 1960-04-28 | 1960-10-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-10-28 | 1964-04-28 | 1964-10-28 | $7700.00 | Window Closed / Lapsed |