US3086853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of gasifying combustible material in a fluidized bed
Assignee: Svenska Skifferolje AB
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Filing: 1960-04-13
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Granted: 1963-04-23
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Expires: 1980-04-13
Abstract
No abstract record available.
Inventors
- 👤 Brandberg Ake Rudolf Lennart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:26
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/54; C10J3/463; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0933; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
IN A METHOD FOR GASIFYING A COMBUSTIBLE MATERIAL IN A FLUIDIZED, BED ESPECIALLY A MATERIAL HAVING A HIGH ASH CONTENT, SUCH AS BITUMINOUS SHALE, WHEREIN THE COMBUSTIBLE MATERIAL IS SUBJECTED, AT A TEMPERATURE ABOVE ABOUT 800* C., TO CONTROLLED OXIDATION, THE IMPROVEMENT WHICH CONSISTS IN THAT THE MATERIAL IS GASIFIED IN TWO STAGES CARRIED OUT IN THAT THE MATERIAL IS GASIFIED IN TWO STAGES CARRIED OUT IN SEPARATE REACTION ZONES, THE GASIFYING AGENT IN THE FIRST STAGE BEING AIR, SAID FIRST STAGE THUS PRODUCING A NITROGENRICH GAS, THE GASTIFYING AGENT IN THE SECOND STAGE BEING OXYGEN AND STEAM, SAID SECOND GASIFYING STAGE THUS PRODUCING A COMBUSTIBLE GAS WHICH IS SUBSTANTIALLY FREE FROM NITROGEN AND WHICH IS WITHDRAWN SEPARATELY FROM THE GAS PRODUCED IN SAID FIRST GASIFYING STAGE.
Claim 2
Dependent Claim
127 words
IN A METHOD FOR GASIFYING A COMBUSTIBLE MATERIAL IN A FLUIDIZED, BED ESPECIALLY A MATERIAL HAVING A HIGH ASH CONTENT, SUCH AS BITUMINOUS SHALE, WHEREIN THE COMBUSTIBLE MATERIAL IS SUBJECTED, AT A TEMPERATURE ABOVE ABOUT 800* C., TO CONTROLLED OXIDATION, THE IMPROVEMENT WHICH CONSISTS IN THAT THE MATERIAL IS GASIFIED IN TWO STAGES CARRIED OUT IN THAT THE MATERIAL IS GASIFIED IN TWO STAGES CARRIED OUT IN SEPARATE REACTION ZONES, THE GASIFYING AGENT IN THE FIRST STAGE BEING AIR, SAID FIRST STAGE THUS PRODUCING A NITROGENRICH GAS, THE GASTIFYING AGENT IN THE SECOND STAGE BEING OXYGEN AND STEAM, SAID SECOND GASIFYING STAGE THUS PRODUCING A COMBUSTIBLE GAS WHICH IS SUBSTANTIALLY FREE FROM NITROGEN AND WHICH IS WITHDRAWN SEPARATELY FROM THE GAS PRODUCED IN SAID FIRST GASIFYING STAGE.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |