US4090853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Colloil product and method
Assignee: Shell USA Inc
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Filing: 1976-10-26
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Granted: 1978-05-23
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Expires: 1996-10-26
Abstract
Abstract A novel coal and liquid hydrocarbon fuel product, and a method for making the product, are disclosed.
Inventors
- 👤 Eric J. Clayfield
- 👤 Ernest C. Lumb
- 👤 Kenneth J. Wilbraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:35
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/32; C10L1/324
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
106 words
A method of making a fluid fuel product containing coal and a liquid hydrocarbon fuel comprising, mixing coal of a grain size not greater than about 6 mm. with an amount of water not greater than thirty percent by weight, based on the weight of the coal; mixing the wetted coal with liquid hydrocarbon fuel, the amount of coal being controlled so that the mixture contains not more than fifty percent by weight of coal, based on the weight of the coal and fuel; and milling the mixture thus formed to produced a fluid fuel containing coal particles not greater than about 500 microns in size.
Claim 2
Independent Claim
106 words
A method of making a fluid fuel product containing coal and a liquid hydrocarbon fuel comprising, mixing coal of a grain size not greater than about 6 mm. with an amount of water not greater than thirty percent by weight, based on the weight of the coal; mixing the wetted coal with liquid hydrocarbon fuel, the amount of coal being controlled so that the mixture contains not more than fifty percent by weight of coal, based on the weight of the coal and fuel; and milling the mixture thus formed to produced a fluid fuel containing coal particles not greater than about 500 microns in size.
Claim 3
Dependent Claim
23 words
The method of claim 1, wherein the coal and water are mixed at a temperature of from about 75° to about 95° C.
Claim 4
Dependent Claim
15 words
The method of claim 2, wherein the fuel is a 200-6000 seconds Redwood I oil.
Claim 5
Dependent Claim
15 words
The method of claim 3, wherein the fuel is a 3500 seconds Redwood I oil.
Claim 6
Dependent Claim
110 words
A fuel product containing coal and a liquid hydrocarbon fuel, and characterized by improved storage life, said product being formed by mixing coal of a grain size not greater than about 6 mm. with an amount of water not greater than thirty percent by weight, based on the weight of the coal; mixing the wetted coal with liquid hydrocarbon fuel, the amount of coal being controlled so that the mixture contains not more than fifty percent by weight of coal, based on the weight of the coal and fuel; and milling the mixture thus formed to produce in the fuel coal particles not greater than about 500 microns in size.
Claim 7
Dependent Claim
110 words
A fuel product containing coal and a liquid hydrocarbon fuel, and characterized by improved storage life, said product being formed by mixing coal of a grain size not greater than about 6 mm. with an amount of water not greater than thirty percent by weight, based on the weight of the coal; mixing the wetted coal with liquid hydrocarbon fuel, the amount of coal being controlled so that the mixture contains not more than fifty percent by weight of coal, based on the weight of the coal and fuel; and milling the mixture thus formed to produce in the fuel coal particles not greater than about 500 microns in size.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |