Patent US3705086A successfully refreshed from Google Patents.
US3705086A
Expired / Lapsed
US
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Coal carbonizing in trickling streams
Assignee: GEA Group AG
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Filing: 1970-07-07
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Granted: 1972-12-05
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Expires: 1990-07-07
Abstract
Abstract FINE-GRAINED COKE IS PRODUCED BY A CARBONIZATION OF FINE-GRAINED COAL BY A TREATMENT WITH A HOT GAS. THE COAL TRICKLES DOWN IN A COUNTERCURRENT TO THE RISING HOT GAS PAST FIXTURES WHICH RETARD THE FREE FALL AND OCCUPY UP TO 50% OF THE CROSS-SECTION OF THE FLOW. THE COAL MAY IN THAT WAY BE MADE SUITABLE FOR USE IN MAKING BRIQUETTES.
Inventors
- 👤 Paul Schmalfeld
- 👤 Helmut Hahn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:39
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04; C10B49/08
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) | 1975-12-05 | 1976-06-05 | 1976-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-05 | 1980-06-05 | 1980-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-05 | 1984-06-05 | 1984-12-05 | $7700.00 | Window Closed / Lapsed |