US2952610A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of lubricating oils
Assignee: Sunoco Inc
•
Filing: 1956-05-17
•
Granted: 1960-09-13
•
Expires: 1976-05-17
Abstract
No abstract record available.
Inventors
- 👤 Fear James Van Dyck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:24
CPC Classifications
C; C09; C09C; C09C1/00; C09C1/44; C09C1/48; C10; C10G; C10G21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
142 words
PROCESS FOR THE PRODUCTION OF LUBRICATING OIL, WAX AND CARBON BLACK OIL WHICH COMPRISES CONTACTING A HYDROCARBON FRACTION, DERIVED FROM CATALYTICALLY CRACKING A GAS OIL AND BOILING MAINLY IN THE RANGE OF 500-920*F., WITH A SOLVENT WHICH PREFERENTIALLY DISSOLVES AROMATICS, THE VOLUME OF SOLVENT BEING LESS THAN THE VOLUME OF OIL BUT SUFFICIENT TO EXTRACT A PREPONDERANT PROPORTION OF THE AROMATICS FROM SAID FRACTION, SEPARATING SOLVENT FROM A FRIST RAFFINATE CONTAINING WAX AND UNEXTRACTED AROMATICS AND FROM THE EXTRACT TO YIELD A CARBON BLACK OIL HAVING A HIGH BUREAU OF MINES CORRELATION INDEX, DEWAXING THE FRIST RAFFINATE IN THE PRESENCE OF A DEWAXING SOLVENT AND RECOVERING A WAX FRACTION, SEPARATING THE DEWAXED FIRST RAFFINATE FROM THE DEWAXING SOLVENT, CONTACTING THE DEWAXED FIRST RAFFINATE WITH A SOLVENT WHICH PREFERENTIALLY DISSOLVES AROMATICS, AND RECOVERING A HIGH VISCOSITY INDEX LUBRICATING OIL AS A SECOND RAFFINATE.
Claim 2
Dependent Claim
142 words
PROCESS FOR THE PRODUCTION OF LUBRICATING OIL, WAX AND CARBON BLACK OIL WHICH COMPRISES CONTACTING A HYDROCARBON FRACTION, DERIVED FROM CATALYTICALLY CRACKING A GAS OIL AND BOILING MAINLY IN THE RANGE OF 500-920*F., WITH A SOLVENT WHICH PREFERENTIALLY DISSOLVES AROMATICS, THE VOLUME OF SOLVENT BEING LESS THAN THE VOLUME OF OIL BUT SUFFICIENT TO EXTRACT A PREPONDERANT PROPORTION OF THE AROMATICS FROM SAID FRACTION, SEPARATING SOLVENT FROM A FRIST RAFFINATE CONTAINING WAX AND UNEXTRACTED AROMATICS AND FROM THE EXTRACT TO YIELD A CARBON BLACK OIL HAVING A HIGH BUREAU OF MINES CORRELATION INDEX, DEWAXING THE FRIST RAFFINATE IN THE PRESENCE OF A DEWAXING SOLVENT AND RECOVERING A WAX FRACTION, SEPARATING THE DEWAXED FIRST RAFFINATE FROM THE DEWAXING SOLVENT, CONTACTING THE DEWAXED FIRST RAFFINATE WITH A SOLVENT WHICH PREFERENTIALLY DISSOLVES AROMATICS, AND RECOVERING A HIGH VISCOSITY INDEX LUBRICATING OIL AS A SECOND RAFFINATE.
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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) | 1963-09-13 | 1964-03-14 | 1964-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-13 | 1968-03-14 | 1968-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-13 | 1972-03-14 | 1972-09-13 | $7700.00 | Window Closed / Lapsed |