US2687339A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the treatment of liquors to recover potassium and magnesium values
Assignee: International Minerals and Chemical Corp
•
Filing: 1951-01-08
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Granted: 1954-08-24
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Expires: 1971-01-08
Abstract
No abstract record available.
Inventors
- 👤 William B Dancy
- 👤 Robert A Macdonald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:51
CPC Classifications
C; C01; C01F; C01F5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS FOR THE TREATMENT OF POTASSIUM SULFATE REJECT LIQUOR WHICH COMPRISES TREATING A POTASSIUM SULFATE REJECT LIQUOR COMPRISING ESSENTIALLY SULFATE, CHLORIDE, MAGNESIUM AND POTASSIUM IONS WITH CARNALLITE SUSPENDED IN AN AQUEOUS MEDIUM SUBSTANTIALLY SATURATED WITH RESPECT TO MAGNESIUM CHLORIDE, AT A TEMPERATURE OF BETWEEN ABOUT 60* C. AND ABOUT 85* C., AND SEPARATING KAINITE FROM THE RESULTING MIXTURE UPON SUBSTAN-
Claim 2
Dependent Claim
61 words
A PROCESS FOR THE TREATMENT OF POTASSIUM SULFATE REJECT LIQUOR WHICH COMPRISES TREATING A POTASSIUM SULFATE REJECT LIQUOR COMPRISING ESSENTIALLY SULFATE, CHLORIDE, MAGNESIUM AND POTASSIUM IONS WITH CARNALLITE SUSPENDED IN AN AQUEOUS MEDIUM SUBSTANTIALLY SATURATED WITH RESPECT TO MAGNESIUM CHLORIDE, AT A TEMPERATURE OF BETWEEN ABOUT 60* C. AND ABOUT 85* C., AND SEPARATING KAINITE FROM THE RESULTING MIXTURE UPON SUBSTAN-
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-08-23 | 1958-02-22 | 1958-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-23 | 1962-02-22 | 1962-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-23 | 1966-02-22 | 1966-08-24 | $7700.00 | Window Closed / Lapsed |