US3414480A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractional vapor product absorption of fluidized lignite carbonization
Assignee: HRI Inc
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Filing: 1965-10-01
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Granted: 1968-12-03
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Expires: 1985-10-01
Abstract
No abstract record available.
Inventors
- 👤 Harold H Stotler
- 👤 Boyum Asmund
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:34
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04; C10B49/08; C10B49/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A PROCESS FOR THE CARBONIZATION OF LIGNITE CONTAINING VOLATILE CONSTITUENTS WHICH COMPRISES: (A) MAINTAINING A DENSE PHASE FLUIDIZED BED OF PARTICLES OF LIGNITE IN A CARBONIZATION ZONE TO DISTILL FROM SAID PARTICLES VOLATILIZABLE CONSTITUENTS THEREBY PRODUCING A CARBONIZED MATERIAL, WHEREIN THE HEAT REQUIRED FOR CARBONIZATION IS SUPPLIED BY HOT FLUE GAS PASSING THROUGH A SERIES OF VERTICAL HEAT EXCHANGE TUBES LOCATED WITHIN THE FLUIDIZED BED; (B) SEPARATING A SUBSTANTIAL PORTION OF THE ENTRAINED SOLIDS FROM THE VOLATIZABLE CONSTITUENTS LEAVING THE CARBONIZATION ZONE IN A SOLID-GAS SEPARATING ZONE AND RETURNING SEPARATED SOLIDS TO THE CARBONIZATION ZONE;
Claim 2
Dependent Claim
95 words
A PROCESS FOR THE CARBONIZATION OF LIGNITE CONTAINING VOLATILE CONSTITUENTS WHICH COMPRISES: (A) MAINTAINING A DENSE PHASE FLUIDIZED BED OF PARTICLES OF LIGNITE IN A CARBONIZATION ZONE TO DISTILL FROM SAID PARTICLES VOLATILIZABLE CONSTITUENTS THEREBY PRODUCING A CARBONIZED MATERIAL, WHEREIN THE HEAT REQUIRED FOR CARBONIZATION IS SUPPLIED BY HOT FLUE GAS PASSING THROUGH A SERIES OF VERTICAL HEAT EXCHANGE TUBES LOCATED WITHIN THE FLUIDIZED BED; (B) SEPARATING A SUBSTANTIAL PORTION OF THE ENTRAINED SOLIDS FROM THE VOLATIZABLE CONSTITUENTS LEAVING THE CARBONIZATION ZONE IN A SOLID-GAS SEPARATING ZONE AND RETURNING SEPARATED SOLIDS TO THE CARBONIZATION ZONE;
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) | 1971-12-03 | 1972-06-03 | 1972-12-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-03 | 1976-06-03 | 1976-12-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-03 | 1980-06-03 | 1980-12-03 | $7700.00 | Window Closed / Lapsed |