Patent US2844526A successfully refreshed from Google Patents.
US2844526A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for carbonizing carbonaceous materials
Assignee: MW Kellogg Co
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Filing: 1956-05-16
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Granted: 1958-07-22
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Expires: 1976-05-16
Abstract
No abstract record available.
Inventors
- 👤 Marvin F Nathan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:44
CPC Classifications
C; C10; C10B; C10B49/00; C10B49/02; C10B49/04; C10B49/08; C10B49/10; B; B01; B01D; B01D51/00; B01D51/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN THE PROCESS FOR TREATMENT OF CARBONACEOUS SOLIDS TO REMOVE VOLATILE CONSTITUENTS THEREFROM IN WHICH THE SOLIDS ARE HEATED IN A DRYING ZONE IN A DENSE PHASE FLUIDIZED BED TO REMOVE WATER THEREFROM, GASES LEAVING SAID DENSE PHASE BED ARE SUBJECTED TO SOLIDS RECOVERY TREATMENT FOR REMOVAL OF THE MAJOR PORTION OF THE SOLIDS ENTRAINED THREIN, THE DRY SOLIDS FROM SAID DENSE PHASE BED ARE PASSED INTO A CARBONIZATION ZONE WHEREIN A CHAR PRODUCT IS FORMED, THE CHAR PRODUCT IS REMOVED FROM THE CARBONIZATION ZONE, COOLED AND ACCUMULATED IN A PRODUCT ZONE, THE IMPROVEMENT WHICH COMPRISES PASSING THE GASES FROM THE DRYING ZONE AFTER SOLIDS RECOVERY TREATMENT TO REMOVE THE MAJOR PORTION OF THE SOLIDS ENTRAINED THEREIN A SCRUBBING ZONE, CONTACTING SAID SUBSTANTIALLY SOLIDS FREE GASES WHILE IN THE SCRUBBING ZONE WITH A LIQUID TO FORM A SOLIDS-LIQUID SLURRY, REMOVING THE SOLIDS-LIQUID SLURRY FROM SAID SCRUBBING ZONE AND COMBINING THEREWITH CHAR PRODUCTS FROM SAID PRODUCT ZONE.
Claim 2
Dependent Claim
156 words
IN THE PROCESS FOR TREATMENT OF CARBONACEOUS SOLIDS TO REMOVE VOLATILE CONSTITUENTS THEREFROM IN WHICH THE SOLIDS ARE HEATED IN A DRYING ZONE IN A DENSE PHASE FLUIDIZED BED TO REMOVE WATER THEREFROM, GASES LEAVING SAID DENSE PHASE BED ARE SUBJECTED TO SOLIDS RECOVERY TREATMENT FOR REMOVAL OF THE MAJOR PORTION OF THE SOLIDS ENTRAINED THREIN, THE DRY SOLIDS FROM SAID DENSE PHASE BED ARE PASSED INTO A CARBONIZATION ZONE WHEREIN A CHAR PRODUCT IS FORMED, THE CHAR PRODUCT IS REMOVED FROM THE CARBONIZATION ZONE, COOLED AND ACCUMULATED IN A PRODUCT ZONE, THE IMPROVEMENT WHICH COMPRISES PASSING THE GASES FROM THE DRYING ZONE AFTER SOLIDS RECOVERY TREATMENT TO REMOVE THE MAJOR PORTION OF THE SOLIDS ENTRAINED THEREIN A SCRUBBING ZONE, CONTACTING SAID SUBSTANTIALLY SOLIDS FREE GASES WHILE IN THE SCRUBBING ZONE WITH A LIQUID TO FORM A SOLIDS-LIQUID SLURRY, REMOVING THE SOLIDS-LIQUID SLURRY FROM SAID SCRUBBING ZONE AND COMBINING THEREWITH CHAR PRODUCTS FROM SAID PRODUCT ZONE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |