US3649470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hot brine seeding technique to increase flashing efficiencies in multistage flash evaporators
Assignee: United States Department of the Interior
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Filing: 1970-01-28
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Granted: 1972-03-14
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Expires: 1990-01-28
Abstract
Abstract TO ENHANCE FALSHING IN A STAGE OF MULTISTAGE FLASH DISTILLATION UNIT, SMALL AMOUNTS OF LIQUID, AT THE SAME OR A LOWER TEMPERATURE THAN THE DISTILLAND IN THE STAGE, ARE INJECTED BELOW THE LEVEL OF THE DISTILLAND.
Inventors
- 👤 Jack A Hunter
- 👤 Frederick W Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:03
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/06; B01D3/065; Y; Y10; Y10S; Y10S159/00; Y10S159/38
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) | 1975-03-14 | 1975-09-13 | 1976-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-14 | 1979-09-13 | 1980-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-14 | 1983-09-13 | 1984-03-14 | $7700.00 | Window Closed / Lapsed |