Patent BE863052A successfully refreshed from Google Patents.
US3577337A
Expired / Lapsed
US
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Solvent extraction of coal
Assignee: United States Department of the Interior
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Filing: 1970-03-11
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Granted: 1971-05-04
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Expires: 1990-03-11
Abstract
Abstract COAL IS EXTRACTED IN QUINOLINE BY TREATMENT OF A COALQUINOLINE SLURRY WITH ULTRASONIC IRADIATION AT AMBIENT TEMPERATURE. THE QUINOLINE MAY THEN BE REMOVED FROM THE SOLUBILIZED COAL FRACTION BY CONVERSION TO A WATER-SOLUBLE QUINOLINE SALT. THE SOLUBILIZED FRACTION MAY BE USED FOR PRODUCTION OF GASOLINE, AROMATIC CHEMICALS, CARBON BLACK, ELECTRODE CARBONS, LOW-SULFUR AND -ASH FUELS FOR POWER PLANTS, ETC.
Inventors
- 👤 Theodore Kessler
- 👤 Andrew G Sharkey Jr
- 👤 Joseph Malli Jr
- 👤 Robert A Friedel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:04
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/0261; B01D11/0265; B01J; B01J19/00; B01J19/08; B01J19/10; C; C10; C10G; C10G1/00; C10G1/04; Y; Y10; Y10S; Y10S264/00; Y10S264/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-03 | 1974-11-02 | 1975-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-03 | 1978-11-02 | 1979-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-03 | 1982-11-02 | 1983-05-04 | $7700.00 | Window Closed / Lapsed |