Patent US3887337A successfully refreshed from Google Patents.
US3887337A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluidization column
Assignee: Belgian Nuclear Research Centre
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Filing: 1972-08-21
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Granted: 1975-06-03
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Expires: 1992-08-21
Abstract
Abstract A fluidization column with auxiliary gas lift mixing device to promote uniformity in a fluidized bed of particles with a range of particle density or particle size, said gas lift comprising a riser pipe and a bell inside which opens a duct for supplying, from outside the column, variable gas feed to the riser pipe, said bell being arranged in the fluidized bed with the lower side of the bell being about one centimeter above the column seive plate, said bell being open on the lower side, the bell upper side being connected to the lower end of the riser pipe.
Inventors
- 👤 Freddy Francois Eugen Descamps
- 👤 Georges Luciaan Dumont
- 👤 Walter Remi Adele Goossens
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:25
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/24; B01J8/38; B01J8/384; B01J8/386; B01J8/245
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A FLUIDIZATION COLUMN COMPRISING A HOLLOW BODY, A PERFORATED PLATE ACROSS THE BODY WHICH SEPARATES THE BODY INTERNALLY INTO A LOWER SPACE AND AN UPPER SPACE, A FLUIDIZATION GAS INLET OPENING INTO THE BODY LOWER SPACE, AN OUTLET FROM A TOP OF THE BODY UPPER SPACE, A BELL IN THE BODY UPPER SPACE, SAID BELL OPENING DOWNWARD, BEING SPACED FROM AND FACING THE PERFORATED PLATE, THE SPACING BETWEEN SAID PERFORATED PLATE AND THE BELL LOWER EDGE BEING ABOUT 1 CM AND THE RATIO OF THE BELL LOWER SIDE AREA TO THE PLATE LYING BETWEEN 1/2 AND 1/10, AN OPEN-TOP RISER PIPE IN THE BODY UPPER SPACE WITH THE LOWERMOST END OF SAID RISER PIPE OPERATIVELY CONNECTED THROUGH THE TOP OF SAID BELL, THE RATIO OF THE BELL LOWER SIDE AREA TO THE RISER PIPE CROSS-SECTION LYING BETWEEN 3 AND 50, AND A DUCT FOR SUPPLYING SUPPLEMENTARY GAS TO THE RISER PIPE, THE INLET OF WHICH DUCT LIES OUTSIDE THE BODY AND WHICH DUCT OPENS INTO THE SIDE OF THE BELL.
Claim 2
Dependent Claim
170 words
A FLUIDIZATION COLUMN COMPRISING A HOLLOW BODY, A PERFORATED PLATE ACROSS THE BODY WHICH SEPARATES THE BODY INTERNALLY INTO A LOWER SPACE AND AN UPPER SPACE, A FLUIDIZATION GAS INLET OPENING INTO THE BODY LOWER SPACE, AN OUTLET FROM A TOP OF THE BODY UPPER SPACE, A BELL IN THE BODY UPPER SPACE, SAID BELL OPENING DOWNWARD, BEING SPACED FROM AND FACING THE PERFORATED PLATE, THE SPACING BETWEEN SAID PERFORATED PLATE AND THE BELL LOWER EDGE BEING ABOUT 1 CM AND THE RATIO OF THE BELL LOWER SIDE AREA TO THE PLATE LYING BETWEEN 1/2 AND 1/10, AN OPEN-TOP RISER PIPE IN THE BODY UPPER SPACE WITH THE LOWERMOST END OF SAID RISER PIPE OPERATIVELY CONNECTED THROUGH THE TOP OF SAID BELL, THE RATIO OF THE BELL LOWER SIDE AREA TO THE RISER PIPE CROSS-SECTION LYING BETWEEN 3 AND 50, AND A DUCT FOR SUPPLYING SUPPLEMENTARY GAS TO THE RISER PIPE, THE INLET OF WHICH DUCT LIES OUTSIDE THE BODY AND WHICH DUCT OPENS INTO THE SIDE OF THE BELL.
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) | 1978-06-02 | 1978-12-02 | 1979-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-02 | 1982-12-02 | 1983-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-02 | 1986-12-02 | 1987-06-03 | $7700.00 | Window Closed / Lapsed |