US3375188A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for deashing coal in the absence of added hydrogen
Assignee: Lummus Technology LLC
•
Filing: 1966-12-19
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Granted: 1968-03-26
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Expires: 1986-12-19
Abstract
No abstract record available.
Inventors
- 👤 Ward J Bloomer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:32
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/04; C10B; C10B55/00; C10L; C10L9/00; C10L9/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR DEASHING A COAL SELECTED FROM THE GROUP CONSISTING OF BITUMINOUS COAL, SUBBITUMINOUS COAL AND LIGNITE COMPRISED OF EXTRACTABLE CARBONACEOUS MATTER, FUSAIN AND MINERAL MATTER, WHICH COMPRISES: (A) MIXING THE COAL IN CRUSHED FORM IN THE ABSENCE OF ADDED HYDROGEN WITH A HIGH BOILING AROMATIC LIQUID SOLVENT HAVING CUTPOINTS, CONVERTED TO ONE ATMOSPHERE, OF FROM ABOUT 600 TO ABOUT 900*F. TO FORM A SOLUTION OF SAID EXTRACTABLE CARBONACEOUS MATTER WHEREIN SOLIDS INCLUDING INSOLUBLE FUSIAN AND MINERAL MATTER ARE SUSPENDED; AND (B) SEPARATING SAID SUSPENDED SOLIDS FROM SAID SOLUTION.
Claim 2
Dependent Claim
90 words
A PROCESS FOR DEASHING A COAL SELECTED FROM THE GROUP CONSISTING OF BITUMINOUS COAL, SUBBITUMINOUS COAL AND LIGNITE COMPRISED OF EXTRACTABLE CARBONACEOUS MATTER, FUSAIN AND MINERAL MATTER, WHICH COMPRISES: (A) MIXING THE COAL IN CRUSHED FORM IN THE ABSENCE OF ADDED HYDROGEN WITH A HIGH BOILING AROMATIC LIQUID SOLVENT HAVING CUTPOINTS, CONVERTED TO ONE ATMOSPHERE, OF FROM ABOUT 600 TO ABOUT 900*F. TO FORM A SOLUTION OF SAID EXTRACTABLE CARBONACEOUS MATTER WHEREIN SOLIDS INCLUDING INSOLUBLE FUSIAN AND MINERAL MATTER ARE SUSPENDED; AND (B) SEPARATING SAID SUSPENDED SOLIDS FROM SAID SOLUTION.
References Cited (Backward Citations)
US1925005A
Cited
US1904586A
Cited
GB457971A
Cited
US2221410A
Cited
US2686152A
Cited
US3109803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-26 | 1971-09-25 | 1972-03-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-26 | 1975-09-25 | 1976-03-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-26 | 1979-09-25 | 1980-03-26 | $7700.00 | Window Closed / Lapsed |