Patent US2660552A successfully refreshed from Google Patents.
US2660552A
Expired / Lapsed
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Combination process for producing lubricating oils
Assignee: Standard Oil Development Co
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Filing: 1950-09-30
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Granted: 1953-11-24
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Expires: 1970-09-30
Abstract
No abstract record available.
Inventors
- 👤 Forrest H Blanding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:12
CPC Classifications
C; C10; C10G; C10G21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
THE PROCESS OF PRODUCING A LUBRICATING OIL COMPRISING THE STEPS OF: CATALYTICALLY CRACKING A GAS OIL FEED STOCK BOILING IN THE RANGE OF ABOUT 650* TO 1100* F., FRACTIONATING AN OIL FRACTION FROM THE CRACKED PRODUCTS BOILING IN THE RANGE OF ABOUT 700* TO 1100* F., AND THEREAFTER CONTACTING SAID FRACTION WITH A SELECTIVE SOLVENT FOR AROMATIC COMPOUNDS TO REMOVE AROMATIC COMPOUNDS FROM THE SAID FRACTION, SAID PROCESS INCLUDING THE STEP OF DEWAXING THE SAID FRACTION AFTER THE CATALYTIC CRACKING STEP, WHEREBY A HIGH VISCOSITY INDEX LUBRICATING OIL IS OBTAINED.
Claim 2
Dependent Claim
90 words
THE PROCESS OF PRODUCING A LUBRICATING OIL COMPRISING THE STEPS OF: CATALYTICALLY CRACKING A GAS OIL FEED STOCK BOILING IN THE RANGE OF ABOUT 650* TO 1100* F., FRACTIONATING AN OIL FRACTION FROM THE CRACKED PRODUCTS BOILING IN THE RANGE OF ABOUT 700* TO 1100* F., AND THEREAFTER CONTACTING SAID FRACTION WITH A SELECTIVE SOLVENT FOR AROMATIC COMPOUNDS TO REMOVE AROMATIC COMPOUNDS FROM THE SAID FRACTION, SAID PROCESS INCLUDING THE STEP OF DEWAXING THE SAID FRACTION AFTER THE CATALYTIC CRACKING STEP, WHEREBY A HIGH VISCOSITY INDEX LUBRICATING OIL IS OBTAINED.
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) | 1956-11-23 | 1957-05-25 | 1957-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-11-23 | 1961-05-25 | 1961-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-11-23 | 1965-05-25 | 1965-11-24 | $7700.00 | Window Closed / Lapsed |