US3574077A
Expired / Lapsed
US
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Evaporation-electrodialysis process for producing fresh water from brine
Assignee: Asahi Kasei Corp
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Filing: 1969-08-13
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Granted: 1971-04-06
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Expires: 1989-08-13
Abstract
Abstract A PROCESS FOR PRODUCING FRESH WATER EFFICIENTLY BY PASSING THE BRINE THROUGH A SYSTEM CONSISTING OF AN EVAPORATOR AND AN ELECTRODIALYZER USING ION EXCHANGE MEMBRANES (HEREINAFTER REFERRED TO AS AN ELECTRODIALYZER) AND, IF REQUIRED, AN ION EXCHANGER WHILE PREVENTING THE FORMATION OF SCALE IN THE EVAPORATOR.
Inventors
- 👤 Yoshio Tsunoda
- 👤 Leo Ehara
- 👤 Hideo Kawate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:04
CPC Classifications
B; B01; B01D; B01D61/00; B01D61/42; B01D61/44; C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/42; C02F1/46; C02F1/469; C02F1/4693; C02F1/4695; B01D2311/00; B01D2311/04; B01D2311/08; C02F2103/00; C02F2103/08; Y; Y02; Y02A; Y02A20/00; Y02A20/124; Y10; Y10S; Y10S159/00; Y10S159/27
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) | 1974-04-05 | 1974-10-05 | 1975-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-05 | 1978-10-05 | 1979-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-05 | 1982-10-05 | 1983-04-06 | $7700.00 | Window Closed / Lapsed |