US3791994A
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Method of producing adsorption coke from high water content brown coal
Assignee: Rheinbraun AG
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Filing: 1971-05-19
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Granted: 1974-02-12
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Expires: 1991-05-19
Abstract
Abstract IN A METHOD OF PRODUCING ADSORBENT MATERIALS, SUCH AS ADSORPTION COKES FROM A RAW MATERIAL OF HIGH WATER CONTENT, SUCH AS RAW BROWN COAL, AT LEAST ONE PART OF THE VAPORIZABLE COMPONENTS OF SAID RAW MATERIAL ARE REMOVED BY EXPOSING SAID RAW MATERIAL TO A VACUUM.
Inventors
- 👤 W Wenzel
- 👤 F Franke
- 👤 R Jaeger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:58
CPC Classifications
C; C10; C10B; C10B53/00; C10B53/02; C01; C01B; C01B32/00; C01B32/30; C01B32/312; C01B32/336; C10B47/00; Y; Y02; Y02E; Y02E50/00; Y02E50/10
Claims Analysis
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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) | 1977-02-11 | 1977-08-13 | 1978-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-11 | 1981-08-13 | 1982-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-11 | 1985-08-13 | 1986-02-12 | $7700.00 | Window Closed / Lapsed |