Patent US3659042A successfully refreshed from Google Patents.
US3567412A
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Gasification of carbonaceous fuels
Assignee: MW Kellogg Co
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Filing: 1968-08-12
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Granted: 1971-03-02
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Expires: 1988-08-12
Abstract
Abstract A METHOD FOR IMPROVING THE GASIFICATION AND COMBUSTION RATES OF CARBONACEOUS MATERIALS IN A REACTION ZONE CONTAINING A MELT COMPRISING ESSENTIALLY AN ALKALI METAL CARBONATE BY MAINTAINING AT LEAST A CRITICAL MINIMUM CONCENTRATION OF 0.4 WEIGHT PERCENT OF SODIUM SULFATE IN THE REACTION MELT AND THE VISCOSITY OF THE MELT IS MAINTAINED BETWEEN ABOUT 10 AND 150 CENTIPOISES.
Inventors
- 👤 Philip A Lefrancois
- 👤 Kenneth M Barclay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:05
CPC Classifications
B; B01; B01J; B01J10/00; B01J10/005; C; C10; C10J; C10J3/00; C10J3/57; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/0916; C10J2300/092; C10J2300/093; C10J2300/094; C10J2300/0943; C10J2300/0946; C10J2300/0953; C10J2300/0956; C10J2300/0959; C10J2300/0973; C10J2300/0976; C10J2300/0983; C10J2300/0996; C10J2300/18; C10J2300/1861; C10J2300/1884; C10J2300/1892
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |