Patent US2780581A successfully refreshed from Google Patents.
US2780581A
Expired / Lapsed
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Production of lubricating oils
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1954-09-29
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Granted: 1957-02-05
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Expires: 1974-09-29
Abstract
No abstract record available.
Inventors
- 👤 Robert A Macke
- 👤 Edward F Wadley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:04
CPC Classifications
C; C10; C10G; C10G21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A COMBINATION PROCESS FOR PRODUCING LUBRICATING OIL COMPRISING THE STEPS OF CATALYTICALLY CRACKING A GAS OIL BOILING WITHIN THE RANGE OF ABOUT 650* TO 1100*F., SEGREGATING A FIRST OIL FRACTION BOILING WITHIN THE RANGE OF ABOUT 650* TO 110*F. FROM THE CRACKED PRODUCTS, SEGREGATING A SECOND OIL FRACTION BOILING WITHIN THE RANGE OF ABOUT 650* TO 1100*F. FROM A PARAFFIN CRUDE OIL, AND CONTACTING A MIXTURE OF SAID FIRST AND SECOND OIL FRACTIONS WITH A SELECTIVE SOLVENT FOR AROMATIC COMPOUNDS TO REMOVE AROMATIC COMPOUNDS FROM THE SAID MIXTURE, SAID MIXTURE CONTAINING ABOUT 50% OF SAID FIRST OIL FRACTION,
Claim 2
Dependent Claim
98 words
A COMBINATION PROCESS FOR PRODUCING LUBRICATING OIL COMPRISING THE STEPS OF CATALYTICALLY CRACKING A GAS OIL BOILING WITHIN THE RANGE OF ABOUT 650* TO 1100*F., SEGREGATING A FIRST OIL FRACTION BOILING WITHIN THE RANGE OF ABOUT 650* TO 110*F. FROM THE CRACKED PRODUCTS, SEGREGATING A SECOND OIL FRACTION BOILING WITHIN THE RANGE OF ABOUT 650* TO 1100*F. FROM A PARAFFIN CRUDE OIL, AND CONTACTING A MIXTURE OF SAID FIRST AND SECOND OIL FRACTIONS WITH A SELECTIVE SOLVENT FOR AROMATIC COMPOUNDS TO REMOVE AROMATIC COMPOUNDS FROM THE SAID MIXTURE, SAID MIXTURE CONTAINING ABOUT 50% OF SAID FIRST OIL FRACTION,
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) | 1960-02-05 | 1960-08-06 | 1961-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-05 | 1964-08-06 | 1965-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-05 | 1968-08-06 | 1969-02-05 | $7700.00 | Window Closed / Lapsed |