US3605426A
Expired / Lapsed
US
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Desalination process by controlled freezing
Assignee: BEI T CHAO
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Filing: 1968-11-27
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Granted: 1971-09-20
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Expires: 1988-11-27
Abstract
Abstract A process for recovery of fresh water from brine by formation of ice on the surface of chilled hollow pellets containing a liquid which is at least partially frozen and melts at a temperature below the freezing point of water. The heat of fusion of the frozen liquid absorbs the heat of crystallization evolved in the formation of said ice and provides the pellets with high effective heat capacity and high thermal efficiency. After separation of the ice covered pellets from the brine, the ice is melted and recovered as the product water.
Inventors
- 👤 Bei T Chao
- 👤 Edward F Janzow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:45
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/22; C02F2103/00; C02F2103/08; Y; Y02; Y02A; Y02A20/00; Y02A20/124
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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |