US2604988A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Froth flotation of potassium chloride from sodium chloride
Assignee: MINES DOMANIALES DE POTASSE
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Filing: 1947-06-17
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Granted: 1952-07-29
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Expires: 1967-06-17
Abstract
No abstract record available.
Inventors
- 👤 Colin Jules
- 👤 Friedrich Roger
- 👤 Herrgott Xavier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:51
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/06; B03D1/14; B03D1/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
THE METHOD OF SEPARATION BY FLOTATION OF POTASSIUM CHLORIDE FROM SODIUM CHLORIDE WITH A COLLECTING AGENT SELECTIVE FOR POTASSIUM CHLORIDE, WHICH COMPRISES A FIRST STAGE OF FLOTATION INCLUDING THE STEP OF FLOATING, REMOVING A FROTH CONCENTRATE, SEPARATING THE TAILINGS TO REMOVE THEREFROM A FRACTION OF RELATIVELY HIGH SOLID CONTENT LEAVING A LIQUOR FRACTION, PASSING, SAID FROTH CONCENTRATE FROM THE FIRST STAGE OF FLOATION TO SAID LIQUOR FRACTION TO PROVIDE A COMBINED FROTH
Claim 2
Independent Claim
72 words
THE METHOD OF SEPARATION BY FLOTATION OF POTASSIUM CHLORIDE FROM SODIUM CHLORIDE WITH A COLLECTING AGENT SELECTIVE FOR POTASSIUM CHLORIDE, WHICH COMPRISES A FIRST STAGE OF FLOTATION INCLUDING THE STEP OF FLOATING, REMOVING A FROTH CONCENTRATE, SEPARATING THE TAILINGS TO REMOVE THEREFROM A FRACTION OF RELATIVELY HIGH SOLID CONTENT LEAVING A LIQUOR FRACTION, PASSING, SAID FROTH CONCENTRATE FROM THE FIRST STAGE OF FLOATION TO SAID LIQUOR FRACTION TO PROVIDE A COMBINED FROTH
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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) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |