Patent US2902444A successfully refreshed from Google Patents.
US2902444A
Expired / Lapsed
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Phenol extraction of hydrocarbons with alcohol solvent modifier
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-08-29
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Granted: 1959-09-01
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Expires: 1975-08-29
Abstract
No abstract record available.
Inventors
- 👤 Albert J Shmidl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:09
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A METHOD FOR TREATING A LUBRICATING OIL FRACTION WHICH COMPRISES, CONTACTING SAID FRACTION WITH A SOLVENT MIXTURE OF PHENOL AND A SMALL BUT EFFECTIVE AMOUNT OF A SUBSTANTIALLY WATER-INSOLUBLE SATURATED ALIPHATIC ALCOHOL BOILING WITHIN THE RANGE FROM ABOUT 275*F. TO ABOUT 450*F. UNDER CONDITIONS TO FORM A RAFFINATE PHASE AND AN EXTRACT PHASE, SEPARATING SAID PHASE, AND SEPARATELY RECOVERING SAID SOLVENT MIXTURE FROM SAID PHASES.
Claim 2
Independent Claim
65 words
A METHOD FOR TREATING A LUBRICATING OIL FRACTION WHICH COMPRISES, CONTACTING SAID FRACTION WITH A SOLVENT MIXTURE OF PHENOL AND A SMALL BUT EFFECTIVE AMOUNT OF A SUBSTANTIALLY WATER-INSOLUBLE SATURATED ALIPHATIC ALCOHOL BOILING WITHIN THE RANGE FROM ABOUT 275*F. TO ABOUT 450*F. UNDER CONDITIONS TO FORM A RAFFINATE PHASE AND AN EXTRACT PHASE, SEPARATING SAID PHASE, AND SEPARATELY RECOVERING SAID SOLVENT MIXTURE FROM SAID PHASES.
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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |