US2783189A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Liquid-granular solids contacting
Assignee: ExxonMobil Oil Corp
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Filing: 1954-04-22
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Granted: 1957-02-26
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Expires: 1974-04-22
Abstract
No abstract record available.
Inventors
- 👤 Eric V Bergstrom
- 👤 Howard W Shea
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:14
CPC Classifications
B; B01; B01J; B01J8/00; B01J8/18; B01J8/20; B01J8/08; B01J8/12; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/917; Y10T; Y10T137/00; Y10T137/2713; Y10T137/2842; Y10T137/2911; Y10T137/2917; Y10T137/8593; Y10T137/86236
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
221 words
A METHOD FOR CONTROLLED WITHDRAWAL OF GRANULAR SOLIDS FROM A CONFINED LIQUID-GRANULAR SOLIDS CONTACTING ZONE, WHICH COMPRISES: PASSING GRANULAR SOLIDS DOWNWARDLY FROM THE CONTACTING ZONE AS A SEAL COLUMN WITH THE GRANULAR SOLIDS PARTICLES IN THE CONTINUOUS PHASE; SUSPENDING GRANULAR SOLIDS FROM THE LOWER SECTION OF THE SEAL COLUMN IN LIQUID AND PASSING THE SUSPENSION UPWARDLY THROUGH A CONFINED TRANSPORT PASSAGE, THE LOWER END OF WHICH TRANSPORT PASSAGE IS IN FREE AND OPEN COMMUNICATION WITH SAID SEAL COLUMN; DISCHARGING TH SUSPENSION FROM THE TRANSPORT PASSAGE THROUGH ONE OF A PLURALITY OF VERTICALLY SPACED-APART DISCHARGE PASSAGES WHICH CONNECT INTO SAID TRANSPORT PASSAGE AT A PLURALITY OF LEVELS, ALL LYING BELOW THE LIQUID LEVEL IN THE CONTACTING ZONE AND WHICH ARE OF SUFFICIENT SIZE SO AS NOT TO IMPOSE A FLOW RESTRICTION ON THE FLOWING SUSPENSION; AND CONTROLLING THE RATE OF SOLIDS REMOVAL FROM THE CONTACTING ZONE, AT LEAST IN PART, BY SELECTIVELY WITHDRAWING THE SUSPENSION THROUGH THE ONE OF SAID DISCHARGE PASSAGES SUITABLE TO GIVE THE DESIRED FLOW WHILE PERMITTING NO WITHDRAWAL THROUGH THE OTHER DISCHARGE PASSAGES, AN INCREASE IN FLOW BEING ACCOMPLISHED BY USING A LOWER DISCHARGE PASSAGE AND THEREBY LOWERING THE LEVEL OF WITHDRAWAL FROM THE TRANSPORT PASSAGE, WHILE A DECREASE IS EFFECTED BY USING A HIGHER DISCHARGE PASSAGE AND THEREBY RAISING THE LEVEL OF WITHDRAWAL FROM THE TRANSPORT PASSAGE.
Claim 2
Independent Claim
221 words
A METHOD FOR CONTROLLED WITHDRAWAL OF GRANULAR SOLIDS FROM A CONFINED LIQUID-GRANULAR SOLIDS CONTACTING ZONE, WHICH COMPRISES: PASSING GRANULAR SOLIDS DOWNWARDLY FROM THE CONTACTING ZONE AS A SEAL COLUMN WITH THE GRANULAR SOLIDS PARTICLES IN THE CONTINUOUS PHASE; SUSPENDING GRANULAR SOLIDS FROM THE LOWER SECTION OF THE SEAL COLUMN IN LIQUID AND PASSING THE SUSPENSION UPWARDLY THROUGH A CONFINED TRANSPORT PASSAGE, THE LOWER END OF WHICH TRANSPORT PASSAGE IS IN FREE AND OPEN COMMUNICATION WITH SAID SEAL COLUMN; DISCHARGING TH SUSPENSION FROM THE TRANSPORT PASSAGE THROUGH ONE OF A PLURALITY OF VERTICALLY SPACED-APART DISCHARGE PASSAGES WHICH CONNECT INTO SAID TRANSPORT PASSAGE AT A PLURALITY OF LEVELS, ALL LYING BELOW THE LIQUID LEVEL IN THE CONTACTING ZONE AND WHICH ARE OF SUFFICIENT SIZE SO AS NOT TO IMPOSE A FLOW RESTRICTION ON THE FLOWING SUSPENSION; AND CONTROLLING THE RATE OF SOLIDS REMOVAL FROM THE CONTACTING ZONE, AT LEAST IN PART, BY SELECTIVELY WITHDRAWING THE SUSPENSION THROUGH THE ONE OF SAID DISCHARGE PASSAGES SUITABLE TO GIVE THE DESIRED FLOW WHILE PERMITTING NO WITHDRAWAL THROUGH THE OTHER DISCHARGE PASSAGES, AN INCREASE IN FLOW BEING ACCOMPLISHED BY USING A LOWER DISCHARGE PASSAGE AND THEREBY LOWERING THE LEVEL OF WITHDRAWAL FROM THE TRANSPORT PASSAGE, WHILE A DECREASE IS EFFECTED BY USING A HIGHER DISCHARGE PASSAGE AND THEREBY RAISING THE LEVEL OF WITHDRAWAL FROM THE TRANSPORT PASSAGE.
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) | 1960-02-26 | 1960-08-27 | 1961-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-02-26 | 1964-08-27 | 1965-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-02-26 | 1968-08-27 | 1969-02-26 | $7700.00 | Window Closed / Lapsed |