Patent US4484929A successfully refreshed from Google Patents.
US4484929A
Expired / Lapsed
US
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Solid fuel oil mixtures
Assignee: BP PLC
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Filing: 1982-10-05
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Granted: 1984-11-27
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Expires: 2002-10-05
Abstract
Abstract Fuel composition comprises (a) 15 to 60% be weight, preferably 40 to 55%, of a friable solid fuel, e.g. coal, (b) a stabilizing additive composition and (c) a fuel oil. The additive comprises the combination of a polymer containing functional groups, e.g., maleinized polybutadiene, and a surfactant. The composition is suitable for use as a liquid fuel for industrial burners.
Inventors
- 👤 Paul R. Rutter
- 👤 Christopher J. Veal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:14
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/322
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
72 words
A stable fuel composition consisting essentially of (a) 45.7% by weight of particles of a coal, (b) an additive composition in an amount 0.2% by weight, said additive being the combination of maleinised polybutadiene in an amount of 0.1% by weight and a surfactant which is a mixture of 0.05% by weight of methylbis(2-hydroxylethyl) alkyl chloride ammonium compound and sodium bis tri decyl sulfosuccinate and (c) fuel oil being the remaining component.
Claim 2
Dependent Claim
72 words
A stable fuel composition consisting essentially of (a) 45.7% by weight of particles of a coal, (b) an additive composition in an amount 0.2% by weight, said additive being the combination of maleinised polybutadiene in an amount of 0.1% by weight and a surfactant which is a mixture of 0.05% by weight of methylbis(2-hydroxylethyl) alkyl chloride ammonium compound and sodium bis tri decyl sulfosuccinate and (c) fuel oil being the remaining component.
Claim 3
Dependent Claim
23 words
A fuel composition according to claim 1 wherein the solid fuel particles are preground to a particle size not greater than 250 micron.
Claim 4
Dependent Claim
30 words
A fuel composition according to claim 1 wherein the fuel oil is a petroleum based fuel oil fraction having a viscosity of not more than 600 cSt at 50° C.
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) | 1987-11-27 | 1988-05-28 | 1988-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-27 | 1992-05-28 | 1992-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-27 | 1996-05-28 | 1996-11-27 | $7700.00 | Window Closed / Lapsed |