US3565767A
Expired / Lapsed
US
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Method and apparatus for removing dissolved impurities from water
Assignee: POLYCOM CORP
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Filing: 1968-06-10
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Granted: 1971-02-23
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Expires: 1988-06-10
Abstract
Abstract A PRESSURIZED EVAPORATION METHOD AND APPARATUS FOR OBTAINING PURIFIED WATER SALINE SOLUTIONS COMPRISING FEEDING A SUPPLY OF THE SOLUTION INTO A SUBSTANTIALLY CLOSED VESSEL IN A QUANTITY SUFFICIENT TO PROVIDE AN EVAPORATING SURFACE AND A SPACE ABOVE THAT SURFACE, APPLYING A POSITIVE AIR PRESSURE TO THE EVAPORATING SURFACE BY FEEDING PRESSURIZING AIR INTO THE AIR SPACE; CAUSING WATER TO PASS INTO THE PRESSURIZING SPACE FROM THE SOLUTION AS AN EVAPORATE BY HEATING THE SOLUTION, THE PRESSURIZATION BEING OPERATIVE TO SUPPRESS BOILING OR VAPOR FORMATION WITHIN THE BODY OF THE SOLUTION; CONTROLLABLY RELEASING THE EVAPORATE FROM THE AIR SPACE AND CONDENSING IT AS PURIFIED WATER.
Inventors
- 👤 George S Light
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:03
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/34; B01D3/343; B01D3/346; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y10; Y10S; Y10S203/00; Y10S203/11
Claims Analysis
Total Claims: 0
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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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |