US3704101A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for operating multiple effect evaporators
Assignee: Kalium Chemicals Ltd
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Filing: 1970-08-25
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Granted: 1972-11-28
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Expires: 1990-08-25
Abstract
Abstract A METHOD OF PROVIDING FOR THE RECOVERY OF THE MAXIMUM QUANTITY OF A DESIRED SALT IN A MULTIPLE SALT SOLUTION IS SHOWN WHEREIN THE SOLUTION IS SUBJECTED TO SEVERAL EVAPORATION STEPS. CRYSTALLIZED DESIRED SALT FROM ONE EVAPORATION STEP IS FORWARDED TO A HOTTER EVAPORATOR WHERE IT CAN BE DISSOLVED TO FURTHER SATURATE SOLUTION THEREIN WITH THE DESIRED SALT.
Inventors
- 👤 Clifford J Kelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:21
CPC Classifications
B; B01; B01D; B01D1/00; B01D1/26
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) | 1975-11-28 | 1976-05-29 | 1976-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-28 | 1980-05-29 | 1980-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-28 | 1984-05-29 | 1984-11-28 | $7700.00 | Window Closed / Lapsed |