US2913395A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coking process
Assignee: Union Oil Company of California
•
Filing: 1957-03-04
•
Granted: 1959-11-17
•
Expires: 1977-03-04
Abstract
No abstract record available.
Inventors
- 👤 Ross A Hanson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:54
CPC Classifications
C; C10; C10B; C10B55/00; C10G; C10G21/00; C10G21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A METHOD FOR PRODUCING HIGH-GRADE, LOW-ASH COKE OF LOW VANADIUM CONTENT FROM A HEAVY MINERAL OIL CONTAINING SUBSTANTIAL AMOUNTS OF METALLIC CONTAMINANTS INCLUDING VANADIUM, WHICH COMPRISES SUBJECTING SAID OIL TO SOLVENT EXTRACTION WITH A DEPENTANIZED ALKYLATE GASOLINE FRACTION BOILING BETWEEN ABOUT 200* AND 300* F., SAID GASOLINE FRACTION CONTAINING PRINCIPALLY ISOHEXANES, ISOHEPTANES, AND ISOOCTANES, THEREBY FORMING AN EXTRACT PHASE COMPRISING THE MAJOR PROPORTION OF SAID OIL, AND A HEAVY RAFFINATE PHASE CONSTITUTING A MINOR PORTION OF SAID OIL, SEPARATING SAID PHASES, REMOVING THE SOLVENT FROM SAID EXTRACT PHASE AND SUBJECTING THE EXTRACT OIL TO THERMAL COKING AT A TEMPERATURE BETWEEN ABOUT 800* AND 950 F., AND RECOVERING THE HIGH-GRADE COKE SO PRODUCED.
Claim 2
Independent Claim
112 words
A METHOD FOR PRODUCING HIGH-GRADE, LOW-ASH COKE OF LOW VANADIUM CONTENT FROM A HEAVY MINERAL OIL CONTAINING SUBSTANTIAL AMOUNTS OF METALLIC CONTAMINANTS INCLUDING VANADIUM, WHICH COMPRISES SUBJECTING SAID OIL TO SOLVENT EXTRACTION WITH A DEPENTANIZED ALKYLATE GASOLINE FRACTION BOILING BETWEEN ABOUT 200* AND 300* F., SAID GASOLINE FRACTION CONTAINING PRINCIPALLY ISOHEXANES, ISOHEPTANES, AND ISOOCTANES, THEREBY FORMING AN EXTRACT PHASE COMPRISING THE MAJOR PROPORTION OF SAID OIL, AND A HEAVY RAFFINATE PHASE CONSTITUTING A MINOR PORTION OF SAID OIL, SEPARATING SAID PHASES, REMOVING THE SOLVENT FROM SAID EXTRACT PHASE AND SUBJECTING THE EXTRACT OIL TO THERMAL COKING AT A TEMPERATURE BETWEEN ABOUT 800* AND 950 F., AND RECOVERING THE HIGH-GRADE COKE SO PRODUCED.
References Cited (Backward Citations)
US2270674A
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GB441104A
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US2337448A
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US2340974A
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US2793168A
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US2777802A
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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) | 1962-11-16 | 1963-05-18 | 1963-11-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-16 | 1967-05-18 | 1967-11-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-16 | 1971-05-18 | 1971-11-17 | $7700.00 | Window Closed / Lapsed |