US3707442A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multistaged flash evaporator and a method of operating the same with sponge ball descaling treatment
Assignee: Hitachi Ltd
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Filing: 1970-02-27
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Granted: 1972-12-26
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Expires: 1990-02-27
Abstract
Abstract A MULTISTAGED FLASH EVAPORATOR FOR OBTAINING DISTILLED WATER BY FLASHING A HEATED BRINE AND COOLING THE GENERATED STEAM BY THE BRINE, WHEREIN THE BRINE IS HEATED BEYOND A TEMPERATURE OF EDUCING SCALE ON HEATING SURFACES BUT THE EDUCED SCALE IS REMOVED BY SPONGE BALLS PASSED THROUGH HEATING TUBES OR BY OCCASIONALLY SUPPLYING BRINE OF LOW TEMPERATURE THROUGH THE HEATING TUBES.
Inventors
- 👤 Sankichi Takahashi
- 👤 Katsumoto Otake
- 👤 Toshiaki Horiuchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:11
CPC Classifications
F; F28; F28G; F28G1/00; F28G1/12; B; B01; B01D; B01D3/00; B01D3/06; B01D3/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |