US3645892A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aeration and foam separation employing vortex element
Assignee: Bowles Fluidics Corp
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Filing: 1969-06-13
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Granted: 1972-02-29
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Expires: 1989-06-13
Abstract
Abstract A VORTEX VALVE HAVING SUPPLY AND CONTROL INLET PORTS IS SUPPLIED WITH PRESSURIZED GAS AND PRESSURIZED LIQUID AT RESPECTIVE ONES OF ITS INLET PORTS, AND PROVIDES AN OUTPUT FLOW COMPRISING THE LIQUID WITH INTERSPERSED TINY GAS BUBBLES. THE OUTPUT FLOW MAY BE EMPLOYED TO TRANSFER THE GAS BUBBLES TO A BODY OF LIQUID FOR AERATION PURPOSES. ALTERNATIVELY THE OUTPUT FLOW IS EMPLOYED IN FOAM SEPARATION PROCESSES WHEREIN THE TINY GAS BUBBLES EFFICIENTLY INDUCE FLOTATION OF SURFACE-ACTIVE OR FLOCCULENT MATERIAL SUSPENDED OR OTHERWISE IMMERSED IN A BODY OF LIQUID.
Inventors
- 👤 Edward H Schulman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:03
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/14; B03D1/24; B03D1/26; B03D1/02; B03D1/028; B03D1/1431; B03D1/1443; B03D1/1456; B03D1/1493; C; C02; C02F; C02F1/00; C02F1/68; C02F1/685; Y; Y10; Y10S; Y10S210/00; Y10S210/902; Y10S210/908; Y10S210/91
Claims Analysis
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References Cited (Backward Citations)
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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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |