US3761233A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of gasifying water containing coal
Assignee: Rheinbraun AG
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Filing: 1971-04-02
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Granted: 1973-09-25
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Expires: 1991-04-02
Abstract
Abstract FOR GASIFYING COAL, IN PARTICULAR, WATER CONTAINING GRANULAR RAW BROWN COAL, THE MATERIAL IS INTRODUCED INTO A REACTION TUBE, THE WALLS OF WHICH ARE EXTERNALLY HEATED. THE REACTION TUBE IS DISPOSED APPROXIMATELY HORIZONTALLY SO THAT NO SPONTANEOUS SLIDING OF THE MATERIAL THEREIN MAY OCCUR; THE CONVEYING THEREOF IS EFFECTED BY MEANS OF WATER VAPOR AND POSSIBLY OTHER GASES GENERATED IN THE REACTION TUBE DURING THE HEAT TREATMENT OF THE MATERIAL.
Inventors
- 👤 W Wenzel
- 👤 H Schenck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:31
CPC Classifications
C; C10; C10B; C10B47/00; C10B47/18
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |