US4023862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic mining and transportation of coal using hot oil under pressure
Assignee: Individual
•
Filing: 1975-12-24
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Granted: 1977-05-17
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Expires: 1995-12-24
Abstract
Abstract The method of mining coal entails the use of crude petroleum under high pressure together with elevated temperatures in hydraulic fashion to produce a hybrid oil-coal fuel. A powerful stream of oil is aimed at sections of coal strata to disintegrate the coal. The resultant slurry can be recycled for reuse in the mining operation with provisions being made for screening out the larger coal particles. When the oil-coal slurry reaches the desired consistency, it can be pumped for storage or pipeline delivery to consumers or processing plants.
Inventors
- 👤 Louis Gold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:37
CPC Classifications
E; E21; E21C; E21C41/00; E21C41/16; E21C41/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
A method of mining and transporting coal comprising heating and pumping a supply of oil under pressure to a body of unmined coal, directing a jet of said oil under pressure against said body of coal to disintegrate said coal and form a slurry of coal and oil, screening said slurry of coal and oil to remove the larger pieces of coal, recycling the slurry of coal fines and oil through the foregoing steps until said slurry reaches the desired consistency and pumping said slurry of desired consistency to a desired destination via pipeline.
Claim 2
Independent Claim
94 words
A method of mining and transporting coal comprising heating and pumping a supply of oil under pressure to a body of unmined coal, directing a jet of said oil under pressure against said body of coal to disintegrate said coal and form a slurry of coal and oil, screening said slurry of coal and oil to remove the larger pieces of coal, recycling the slurry of coal fines and oil through the foregoing steps until said slurry reaches the desired consistency and pumping said slurry of desired consistency to a desired destination via pipeline.
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) | 1980-05-16 | 1980-11-15 | 1981-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-16 | 1984-11-15 | 1985-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-16 | 1988-11-15 | 1989-05-17 | $7700.00 | Window Closed / Lapsed |