Patent US3379638A successfully refreshed from Google Patents.
US3379638A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Coal solvation with nonhydrogenated solvent in the absence of added hydrogen
Assignee: Lummus Technology LLC
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Filing: 1965-01-25
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Granted: 1968-04-23
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Expires: 1985-01-25
Abstract
No abstract record available.
Inventors
- 👤 Ward J Bloomer
- 👤 Beverly B Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:01
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/02; B01D11/028; C; C10; C10B; C10B55/00; C10G; C10G1/00; C10G1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A PROCESS FOR PRODUCING A SUBSTANTIALLY ASH-FREE SOLUTION OF CARBONACEOUS MATTER FROM A COAL SELECTED FROM THE GROUP CONSISTING OF BITUMINOUS COAL, SUBBITUMINOUS COAL AND LIGNITE WHICH ARE COMPRISED OF EXTRACTABLE CARBONACEOUS MATTER, FUSAIN AND MINERAL MATTER, WHICH COMPRISES: MIXING THE COAL IN CRUSHED FORM WITH A NON-HYDROGENATED, HIGH BOILING LIQUID SOLVENT OF HIGH AROMATICITY HAVING AN INITIAL BOILING TEMPERATURE, CONVERTED TO ONE ATMOSPHERE, OF FROM ABOUT 650*F. TO ABOUT 850*F.; HEATING SAID MIXTURE IN THE ABSENCE OF ADDED HYDROGEN TO A TEMPERATURE OF FROM ABOUT 600*F. TO ABOUT 850*F. TO FORM A SOLUTION OF SAID EXTRACTABLE CARBONACEOUS MATTER WHEREIN SOLIDS INCLUDING FUSAIN AND MINERAL MATTER ARE SUSPENDED; AND SEPARATING SAID SUSPENDED SOLIDS FROM SAID SOLUTIONS.
Claim 2
Dependent Claim
116 words
A PROCESS FOR PRODUCING A SUBSTANTIALLY ASH-FREE SOLUTION OF CARBONACEOUS MATTER FROM A COAL SELECTED FROM THE GROUP CONSISTING OF BITUMINOUS COAL, SUBBITUMINOUS COAL AND LIGNITE WHICH ARE COMPRISED OF EXTRACTABLE CARBONACEOUS MATTER, FUSAIN AND MINERAL MATTER, WHICH COMPRISES: MIXING THE COAL IN CRUSHED FORM WITH A NON-HYDROGENATED, HIGH BOILING LIQUID SOLVENT OF HIGH AROMATICITY HAVING AN INITIAL BOILING TEMPERATURE, CONVERTED TO ONE ATMOSPHERE, OF FROM ABOUT 650*F. TO ABOUT 850*F.; HEATING SAID MIXTURE IN THE ABSENCE OF ADDED HYDROGEN TO A TEMPERATURE OF FROM ABOUT 600*F. TO ABOUT 850*F. TO FORM A SOLUTION OF SAID EXTRACTABLE CARBONACEOUS MATTER WHEREIN SOLIDS INCLUDING FUSAIN AND MINERAL MATTER ARE SUSPENDED; AND SEPARATING SAID SUSPENDED SOLIDS FROM SAID SOLUTIONS.
References Cited (Backward Citations)
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) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |