Patent US4035281A successfully refreshed from Google Patents.
US4035281A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of fuel oil
Assignee: Mobil Oil AS
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Filing: 1976-03-05
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Granted: 1977-07-12
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Expires: 1996-03-05
Abstract
Abstract This invention provides a process which involves solubilizing coal in a thermally stable refinery petroleum solvent to form a homogeneous solution, and blending the homogeneous solution with petroleum cutter-stock to produce No. 5 fuel oil.
Inventors
- 👤 Wilton F. Espenscheid
- 👤 Tsoung-Yuan Yan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:53
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10G; C10G1/00; C10G1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A process for producing No. 5 fuel oil which comprises forming a slurry by admixing comminuted coal with light FCC cycle oil and FCC main column bottoms or TCC syntower bottoms; heating said slurry at a temperature in the range between about 350° F. and 850° F. for a period of time sufficient to solublize substantially the said coal to form a homogeneous solution phase; separating the homogeneous solution phase from ash and other undissolved solids; and recovering the separate solution phase as No. 5 fuel oil.
Claim 2
Dependent Claim
87 words
A process for producing No. 5 fuel oil which comprises forming a slurry by admixing comminuted coal with light FCC cycle oil and FCC main column bottoms or TCC syntower bottoms; heating said slurry at a temperature in the range between about 350° F. and 850° F. for a period of time sufficient to solublize substantially the said coal to form a homogeneous solution phase; separating the homogeneous solution phase from ash and other undissolved solids; and recovering the separate solution phase as No. 5 fuel oil.
References Cited (Backward Citations)
US2931765A
Cited
US3375188A
Cited
US3642608A
Cited
US3705092A
Cited
US3849287A
Cited
US3870621A
Cited
US3966584A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-11 | 1981-01-10 | 1981-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-11 | 1985-01-10 | 1985-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-11 | 1989-01-10 | 1989-07-12 | $7700.00 | Window Closed / Lapsed |