Patent US2840524A successfully refreshed from Google Patents.
US2840524A
Expired / Lapsed
US
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Hydrocyclone countercurrent washing system
Assignee: Dorr Oliver Inc
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Filing: 1954-09-23
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Granted: 1958-06-24
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Expires: 1974-09-23
Abstract
No abstract record available.
Inventors
- 👤 Paul L Stavenger
- 👤 Elliot B Fitch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:02
CPC Classifications
B; B64; B64C; B64C3/00; B64C3/30; B03; B03B; B03B9/00; B04; B04C; B04C5/00; B04C5/24; B04C9/00; B64C1/00; B64C1/34; C; C03; C03C; C03C1/00; C03C1/02; C03C1/024; B04C2009/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
190 words
A PROCESS FOR THE CONTINUOUS COUNTERCURRENT WASHING OF AT LEAST ONE CONSTITUTENT FROM A LIQUID-BORNE MATERIAL CONTAINING SUCH CONSTITUENT WHICH COMPRISES THE COMBINATION OF STEPS OF FLOWING SAID LIQUID-BORNE MATERIAL, AS A CONFINED FEED STREAM, AND AT PREDETERMINED AVERAGE OPERATIVE VOLUME RATE, TO A PUMPING STEP, FLOWING WASHING LIQUID IN A CONFINED FEED STREAM AND AT A PREDETERMINED AVERAGE OPERATIVE VOLUME RATE TO SAID PUMPING STEP, IN SAID PUMPING STEP, MIXING SAID LIQUID-BORNE MATERIAL WITH SAID WASH LIQUID AND IMPARTING HYDROSTATIC HEAD TO THE MIXTURE, PASSING THE MIXTURE UNDER HYDROSTATIC HEAD AT A PREDETERMINED VOLUME RATE IN A CONFINED STREAM INTO A CONFINED, FREE-WHIRLING LIQUID VORTEX, HYDRAULICALLY SEPARATING SAID MIXTURE IN SAID VORTEX INTO AN OVERLOW FRACTION AND UN UNDERFLOW FRACTION, HYDRAULICALLY DISCHARGING SAID FRACTIONS FROM SAID VORTEX IN SEPARATE AND CONFINED STREAMS, RECIRCULATING A PORTION OF ONE OF SAID DISCHARGED FRACTIONS THROUGH A PART OF A FEED STREAM TO SAID PUMPING STEP, SAID PART OF A FEED STREAM IN WHICH BOTH RECIRCULATED FRACTION AND WASH LIQUID FEED PASS BEING AN ISOLATION LEG, AND SAID FEED STREAM THROUGH WHICH SAID PORTION OF DISCHARGE FRACTION CIRCULATERS BEING THE WASH LIQUID STREAM.
Claim 2
Dependent Claim
190 words
A PROCESS FOR THE CONTINUOUS COUNTERCURRENT WASHING OF AT LEAST ONE CONSTITUTENT FROM A LIQUID-BORNE MATERIAL CONTAINING SUCH CONSTITUENT WHICH COMPRISES THE COMBINATION OF STEPS OF FLOWING SAID LIQUID-BORNE MATERIAL, AS A CONFINED FEED STREAM, AND AT PREDETERMINED AVERAGE OPERATIVE VOLUME RATE, TO A PUMPING STEP, FLOWING WASHING LIQUID IN A CONFINED FEED STREAM AND AT A PREDETERMINED AVERAGE OPERATIVE VOLUME RATE TO SAID PUMPING STEP, IN SAID PUMPING STEP, MIXING SAID LIQUID-BORNE MATERIAL WITH SAID WASH LIQUID AND IMPARTING HYDROSTATIC HEAD TO THE MIXTURE, PASSING THE MIXTURE UNDER HYDROSTATIC HEAD AT A PREDETERMINED VOLUME RATE IN A CONFINED STREAM INTO A CONFINED, FREE-WHIRLING LIQUID VORTEX, HYDRAULICALLY SEPARATING SAID MIXTURE IN SAID VORTEX INTO AN OVERLOW FRACTION AND UN UNDERFLOW FRACTION, HYDRAULICALLY DISCHARGING SAID FRACTIONS FROM SAID VORTEX IN SEPARATE AND CONFINED STREAMS, RECIRCULATING A PORTION OF ONE OF SAID DISCHARGED FRACTIONS THROUGH A PART OF A FEED STREAM TO SAID PUMPING STEP, SAID PART OF A FEED STREAM IN WHICH BOTH RECIRCULATED FRACTION AND WASH LIQUID FEED PASS BEING AN ISOLATION LEG, AND SAID FEED STREAM THROUGH WHICH SAID PORTION OF DISCHARGE FRACTION CIRCULATERS BEING THE WASH LIQUID STREAM.
References Cited (Backward Citations)
US2377524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-06-23 | 1961-12-23 | 1962-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-06-23 | 1965-12-23 | 1966-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-06-23 | 1969-12-23 | 1970-06-24 | $7700.00 | Window Closed / Lapsed |