Patent US2684890A successfully refreshed from Google Patents.
US2684890A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Handling pulverulent materials
Assignee: Dorr Co
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Filing: 1951-05-21
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Granted: 1954-07-27
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Expires: 1971-05-21
Abstract
No abstract record available.
Inventors
- 👤 Walter C Lapple
- 👤 Hermann W Behme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:01
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/38; B01J8/384; B01J8/386
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
APPARATUS OF THE CLASS DESCRIBED WHICH COMPRISES A FLUIDIZED SOLIDS REACTOR COMPRISING AN ENCLOSED CHAMBER, A GAS PERMEABLE PARTITION TRANSVERSELY THEREOF ADAPTED TO SUPPORT A BED OF SOLIDS FLUIDIZED THEREON, MEANS FOR SUPPLYING GAS UPRISINGLY THROUGH THE PARTITION AT SOLIDS FLUIDIZING VELOCITIES, MEANS FOR FEEDING SOLIDS TO THE BED IN THE CHAMBER, AND MEANS FOR REMOVING GAS FROM THE CHAMBER; CHARACTERIZED BY MEANS OF REMOVING SOLIDS FORM THE FLUIDIZED BED OF THE CHAMBER AND IN CLOSED CIRCUIT TO PASS SUCH SOLIDS THROUGH A HEAT EXCHANGER AND RETURN THEM TO THE BED OF THE CHAMBER, COMPRISING MEANS FOR CONDUCTING SOLIDS FROM THE FLUIDIZED BED OF THE CHAMBER TO A FURTHER WALL ENCLOSED CHAMBER ADAPTED TO CONTAIN A VERTICALLY EXTENDING BODY OF FINELY-DIVIDED SOLIDS, THE WALLS OF SUCH CHAMBER BEING PROVIDED WITH A PLURALITY OF LATERALLY DIRECTED DISCHARGE OUTLETS, PATH-FORMING MEANS LEADING TO EACH OUTLET AND HAVING A SOLIDS-SUPPORTING SURFACE EXTENDING INWARDLY FROM THE OUTLET, MEANS FOR PROJECTING A PLURALITY OF STREAMS
Claim 2
Dependent Claim
160 words
APPARATUS OF THE CLASS DESCRIBED WHICH COMPRISES A FLUIDIZED SOLIDS REACTOR COMPRISING AN ENCLOSED CHAMBER, A GAS PERMEABLE PARTITION TRANSVERSELY THEREOF ADAPTED TO SUPPORT A BED OF SOLIDS FLUIDIZED THEREON, MEANS FOR SUPPLYING GAS UPRISINGLY THROUGH THE PARTITION AT SOLIDS FLUIDIZING VELOCITIES, MEANS FOR FEEDING SOLIDS TO THE BED IN THE CHAMBER, AND MEANS FOR REMOVING GAS FROM THE CHAMBER; CHARACTERIZED BY MEANS OF REMOVING SOLIDS FORM THE FLUIDIZED BED OF THE CHAMBER AND IN CLOSED CIRCUIT TO PASS SUCH SOLIDS THROUGH A HEAT EXCHANGER AND RETURN THEM TO THE BED OF THE CHAMBER, COMPRISING MEANS FOR CONDUCTING SOLIDS FROM THE FLUIDIZED BED OF THE CHAMBER TO A FURTHER WALL ENCLOSED CHAMBER ADAPTED TO CONTAIN A VERTICALLY EXTENDING BODY OF FINELY-DIVIDED SOLIDS, THE WALLS OF SUCH CHAMBER BEING PROVIDED WITH A PLURALITY OF LATERALLY DIRECTED DISCHARGE OUTLETS, PATH-FORMING MEANS LEADING TO EACH OUTLET AND HAVING A SOLIDS-SUPPORTING SURFACE EXTENDING INWARDLY FROM THE OUTLET, MEANS FOR PROJECTING A PLURALITY OF STREAMS
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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) | 1957-07-26 | 1958-01-25 | 1958-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-26 | 1962-01-25 | 1962-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-26 | 1966-01-25 | 1966-07-27 | $7700.00 | Window Closed / Lapsed |