Patent US2689786A successfully refreshed from Google Patents.
US2689786A
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Process for the gasification of solid fuels
Assignee: Individual
•
Filing: 1949-12-13
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Granted: 1954-09-21
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Expires: 1969-12-13
Abstract
No abstract record available.
Inventors
- 👤 Hubmann Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:07
CPC Classifications
C; C10; C10J; C10J1/00; C10J1/207
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A PROCESS FOR THE CONTINUOUS GASIFICATION OF SOLID FUEL UNDER AT LEAST ATMOSPHERIC PRESSUR IN A SHAFT FURNACE WHICH COMPRISES INTRODUCING A OXYGEN-CONTAINING GAS INTO A FUEL BED OF COARSEGRAINED FUEL IN A LOWER ZONE OF THE FURNACE FROM BELOW TO GASIFY SUCH FUEL, SIMULTANEOUSLY SEPARATELY GASIFYING FUEL DUST IN A SUSPENDED STATE IN AN UPPER ZONE OF THE FURNACE WITH AN OXYGEN CONTAINING GASIFYING MEDIUM, WITHDRAWING THE GASES EMITTED IN BOTH GASIFYING ZONES JOINTLY FROM A PORTION OF THE FURNACE ABOVE THE FUEL BED AND FEEDING THE COARSE-GRAINED FUEL TO THE FUEL BED THROUGH THE ZONE IN WHICH THE FUEL DUST IS GASIFIED.
Claim 2
Dependent Claim
104 words
A PROCESS FOR THE CONTINUOUS GASIFICATION OF SOLID FUEL UNDER AT LEAST ATMOSPHERIC PRESSUR IN A SHAFT FURNACE WHICH COMPRISES INTRODUCING A OXYGEN-CONTAINING GAS INTO A FUEL BED OF COARSEGRAINED FUEL IN A LOWER ZONE OF THE FURNACE FROM BELOW TO GASIFY SUCH FUEL, SIMULTANEOUSLY SEPARATELY GASIFYING FUEL DUST IN A SUSPENDED STATE IN AN UPPER ZONE OF THE FURNACE WITH AN OXYGEN CONTAINING GASIFYING MEDIUM, WITHDRAWING THE GASES EMITTED IN BOTH GASIFYING ZONES JOINTLY FROM A PORTION OF THE FURNACE ABOVE THE FUEL BED AND FEEDING THE COARSE-GRAINED FUEL TO THE FUEL BED THROUGH THE ZONE IN WHICH THE FUEL DUST IS GASIFIED.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |