Patent US2902443A successfully refreshed from Google Patents.
US2902443A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of lubricating oils by solvent extraction
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1955-08-03
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Granted: 1959-09-01
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Expires: 1975-08-03
Abstract
No abstract record available.
Inventors
- 👤 Edward F Wadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:26
CPC Classifications
C; C10; C10G; C10G21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A METHOD FOR RECOVERING LUBRICATING OIL WHICH COMPRISES CONTACTING A SOLVENT EXTRACT CONTAINING PHENOL AND LUBRICATING OIL COMPONENTS FROM THE PHENOL EXTRACTION OF A CRUDE PETROLEUM LUBRICATING OIL FRACTION BOILING ABOVE ABOUT 900*F. WITH A CYCLE STOCK CONTAINING LUBRICATING OIL COMPONENTS FROM FLUID CATALYTIC CRACKING OF PETROLEUM HYDROCABONS BOILING SUBSTANTIALLY BELOW ABOUT 900*F. BUT DIFFERENT FROM THE BOILING RANGE OF THE CRUDE PETROLEUM LUBRICATING OIL FRACTION UNDER CONDITIONS INCLUDING A TEMPERATURE IN THE RANGE FROM ABOUT 170* TO ABOUT 260*F. AND A SUFFICIENT AMOUNT OF SAID SOLVENT EXTRACT TO PROVIDE A PHENOI TREAT IN THE RANGE FROM ABOUT 100% TO ABOUT 200% BY VOLUME BASED ON THE CYCLE STOCK TO FORM AN EXTRACT PHASE COMPRISING AROMATIC COMPONENTS ORIGINALLY PRESENT IN THE CYCLE STOCK AND A RAFFINATE PHASE CONTAINING SAID LUBRICATING OIL COMPONENTS FROM SAID SOLVENT EXTRACT AND FROM SAID CYCLE STOCK, FRACTIONALLY DISTILLING AND RAFFINATE PHASE INTO A PHENOL FRACTION, A HIGH VISCOSITY INDEX LUBRICATING OIL FRACTION AND A FRACTION CONTAINING HIGH VISCOSITY MATERIAL ORIGINALLY PRESENT IN THE SOLVENT EXTRACT, AND SEPARATELY RECOVERING SAID DISTILLED FRACTIONS.
Claim 2
Independent Claim
176 words
A METHOD FOR RECOVERING LUBRICATING OIL WHICH COMPRISES CONTACTING A SOLVENT EXTRACT CONTAINING PHENOL AND LUBRICATING OIL COMPONENTS FROM THE PHENOL EXTRACTION OF A CRUDE PETROLEUM LUBRICATING OIL FRACTION BOILING ABOVE ABOUT 900*F. WITH A CYCLE STOCK CONTAINING LUBRICATING OIL COMPONENTS FROM FLUID CATALYTIC CRACKING OF PETROLEUM HYDROCABONS BOILING SUBSTANTIALLY BELOW ABOUT 900*F. BUT DIFFERENT FROM THE BOILING RANGE OF THE CRUDE PETROLEUM LUBRICATING OIL FRACTION UNDER CONDITIONS INCLUDING A TEMPERATURE IN THE RANGE FROM ABOUT 170* TO ABOUT 260*F. AND A SUFFICIENT AMOUNT OF SAID SOLVENT EXTRACT TO PROVIDE A PHENOI TREAT IN THE RANGE FROM ABOUT 100% TO ABOUT 200% BY VOLUME BASED ON THE CYCLE STOCK TO FORM AN EXTRACT PHASE COMPRISING AROMATIC COMPONENTS ORIGINALLY PRESENT IN THE CYCLE STOCK AND A RAFFINATE PHASE CONTAINING SAID LUBRICATING OIL COMPONENTS FROM SAID SOLVENT EXTRACT AND FROM SAID CYCLE STOCK, FRACTIONALLY DISTILLING AND RAFFINATE PHASE INTO A PHENOL FRACTION, A HIGH VISCOSITY INDEX LUBRICATING OIL FRACTION AND A FRACTION CONTAINING HIGH VISCOSITY MATERIAL ORIGINALLY PRESENT IN THE SOLVENT EXTRACT, AND SEPARATELY RECOVERING SAID DISTILLED FRACTIONS.
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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) | 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 |