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Patent US2560448A successfully refreshed from Google Patents.
US2560448A
Expired / Lapsed
US
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Recovery of lubricating oil from solvent extracts
Assignee: Standard Oil Development Co
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Filing: 1948-05-15
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Granted: 1951-07-10
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Expires: 1968-05-15
Abstract
No abstract record available.
Inventors
- 👤 Jr William C Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:00
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/28
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A METHOD FOR RECOVERING HIGH VISCOSITY INDEX LUBRICATING OIL FRACTIONS FROM LOW VISCOSITY INDEX SOLVENT EXTRACTS OF LUBRICATING OILS WHICH COMPRISES FORMING A MIXTURE OF A LOW VISCOSITY INDEX SOLVENT EXTRACT OF A LUBRICATING OIL AND A LIGHT PARAFFINIC HYDROCARBON, SAID SOLVENT EXTRACT CONTAINING HIGH VISCOSITY INDEX COMPONENTS FORMING A BED OF SILICA GEL HAVING A PARTICLE SIZE IN THE RANGE BETWEEN 28 AND 350 MESH, CONTACTING THE MIXTURE WITH THE BED OF SILICA GEL AT A TEMPERATURE IN THE RANGE BETWEEN 60* F.A ND 200* F. WITH SAID SILICA GEL BEING IN EXCESS OF SAID EXTRACT TO CAUSE SELECTIVE ADSORPTION BY THE SILICA GEL OF LOW VISCOSITY INDEX CONSTITUENTS IN SAID MIXTURE, REMOVING UNADSORBED MIXTURE FROM CONTACT WITH SAID BED, AND RECOVERING FROM SAID UNADSORBED MIXTURE BY DISTILLATION HIGH VISCOSITY INDEX LUBRICATING OIL FRACTIONS.
Claim 2
Independent Claim
135 words
A METHOD FOR RECOVERING HIGH VISCOSITY INDEX LUBRICATING OIL FRACTIONS FROM LOW VISCOSITY INDEX SOLVENT EXTRACTS OF LUBRICATING OILS WHICH COMPRISES FORMING A MIXTURE OF A LOW VISCOSITY INDEX SOLVENT EXTRACT OF A LUBRICATING OIL AND A LIGHT PARAFFINIC HYDROCARBON, SAID SOLVENT EXTRACT CONTAINING HIGH VISCOSITY INDEX COMPONENTS FORMING A BED OF SILICA GEL HAVING A PARTICLE SIZE IN THE RANGE BETWEEN 28 AND 350 MESH, CONTACTING THE MIXTURE WITH THE BED OF SILICA GEL AT A TEMPERATURE IN THE RANGE BETWEEN 60* F.A ND 200* F. WITH SAID SILICA GEL BEING IN EXCESS OF SAID EXTRACT TO CAUSE SELECTIVE ADSORPTION BY THE SILICA GEL OF LOW VISCOSITY INDEX CONSTITUENTS IN SAID MIXTURE, REMOVING UNADSORBED MIXTURE FROM CONTACT WITH SAID BED, AND RECOVERING FROM SAID UNADSORBED MIXTURE BY DISTILLATION HIGH VISCOSITY INDEX LUBRICATING OIL FRACTIONS.
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) | 1954-07-09 | 1955-01-08 | 1955-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-09 | 1959-01-08 | 1959-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-09 | 1963-01-08 | 1963-07-10 | $7700.00 | Window Closed / Lapsed |