Patent US3449078A successfully refreshed from Google Patents.
Patent US3736247A successfully refreshed from Google Patents.
US3736247A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retorting of solid carbonaceous material
Assignee: Paraho Corp
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Filing: 1971-11-01
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Granted: 1973-05-29
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Expires: 1991-11-01
Abstract
Abstract A PROCESS FOR THE DESTRUCTIVE DISTILLATION OF THE ORGANIC MATERIAL IN SOLID HYDROCARBONACEOUS MATERIAL IN SHAFT VESSELS HAVING A PULVERULENT SOLID MOVED DOWNWARDLY IN A CONTINUOUS COLUM THROUGH SUCCESSIVES ZONES OF PREHEAT, DESTRUCTIVE DISTILLATION, RESIDUE STRIPPING, AND WATERGAS SHIFT, CONTROLLED CONBUSTION OF CARBONACEOUS RESIDUE AT ONE OR MORE LEVEL OF INJECTION OF AN OXYGENEOUS GAS, AND FINALLY COOLING WITH WITHDRAWING THE SOLID THROUGH A HEAT RECOVERY ZONE. THE GAS STREAM LEAVING THE TOP OF THE VESSEL ON ONLY SLIGHTLY ABOVE THE TEMPERATURE OF THE ENTERING HYDROCARBONACEOUS MATERIAL, GENERALLY PROVIDING A MIST OF OIL DROPLETS ENTRAINED IN THE GAS STREAM.
Inventors
- 👤 J Jones
- 👤 A Reeves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:55
CPC Classifications
C; C10; C10G; C10G1/00; C10G1/06; C10B; C10B49/00; C10B49/02; C10B49/04; C10B49/06
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) | 1976-05-28 | 1976-11-27 | 1977-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-28 | 1980-11-27 | 1981-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-28 | 1984-11-27 | 1985-05-29 | $7700.00 | Window Closed / Lapsed |