US3801471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multi-stage flash distillation plant
Assignee: National Institute of Advanced Industrial Science and Technology
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Filing: 1971-02-08
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Granted: 1974-04-02
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Expires: 1991-02-08
Abstract
Abstract The invention disclosed is for a multi-stage flash evaporator having a plurality of flash chambers separated by partitioning walls wherein seawater is flashed under lower pressure in each subsequent stage after the first stage. A seawater flow path connecting each adjacent pair of flash chambers is provided near its open end on the low-pressure side with means having a bellows-like or accordion-shaped passage having a cross-sectional area smaller than the flow path so as to flash seawater.
Inventors
- 👤 K Sato
- 👤 K Kamiyama
- 👤 K Tahara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:54
CPC Classifications
C; C02; C02F; C02F1/00; C02F1/02; C02F1/04; C02F1/06
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |