Patent US3147142A successfully refreshed from Google Patents.
Patent US3663427A successfully refreshed from Google Patents.
US3663427A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of lube hydrocracking stocks
Assignee: Sunoco Inc
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Filing: 1970-10-06
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Granted: 1972-05-16
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Expires: 1990-10-06
Abstract
Abstract A PROCESS FOR PREPARING HIGH V.I. LUBE OILS OF HIGH QUALITY IN IMPROVED YIELD COMPRISING FRACTIONATING THE 720-855*F., (B) 855 TO 980*F. AND (C) THE RESIDUUM OR A FRACTION BOILING AT FROM 986-1070*F., SOLVENT EXTRACTING FRACTION (B) WITH A SOLVENT HAVING PREFERENTIAL SOLUBILITY FOR AROMATICS SUCH AS FURFURAL, RECOMBINING THE THREE FRACTIONS, AND HYDROCRACKING THE COMBINED FRACTIONS AT FROM 720 TO 800*F. USING A HYDROGEN PARTIAL PRESSURE OF FROM 2,000 OT 3,000 P.S.I. THE HIGHER BOILING FRACTION IS DEASPHALTED IF REQUIRED.
Inventors
- 👤 Jeffrey R Thomas
- 👤 Ib Steinmetz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 12:40
CPC Classifications
C; C10; C10G; C10G67/00; C10G67/02; C10G67/04; C10G67/0409; C10G67/0445; C10G2400/00; C10G2400/10
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |