US2738254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation of sodium tetraborate from liquors containing both sodium tetraborate and potassium chloride
Assignee: American Potash and Chemical Corp
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Filing: 1952-11-20
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Granted: 1956-03-13
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Expires: 1972-11-20
Abstract
No abstract record available.
Inventors
- 👤 Henry B Suhr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:13
CPC Classifications
C; C01; C01B; C01B35/00; C01B35/08; C01B35/10; C01B35/06; C01B35/12; C01D; C01D3/00; C01D3/04; C01D3/06
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
111 words
A PROCESS FOR SEPARATING SODIUM TETRABORATE FROM THE MOTHER LIQUOR RESULTING FROM THE CYCLIC PROCESS FOR THE CONCENTRATION OF SEARLES LAKE BRINES ESSENTIALLY TO SATURATION WITH POTASSIUM CHLORIDE, THE REMOVAL OF SODIUM SALTS CONSISTING FOR THE MAJOR PART OF SODIUM CHLORIDE, BURKEITE, AND SODIUM CARBONATE MONOHYDRATE FROM THE CONCENTRATED LIQUOR, THE DILUTION OF THE CONCENTRATED LIQUOR TO PREVENT PRECIPITATION OF SODIUM CHLORIDE DURING SUBSEQUENT COOLING, THE COOLING OF THE DILUTED CONCENTRATED LIQUOR TO THE NEIGHBORHOOD OF 100* F. TO PRECIPITATE A CROP OF POTASSIUM CHLORIDE, AND THE SEPARATING OF THE POTASSIUM CHLORIDE CROP FROM SAID MOTHER LIQUOR, SAID MOTHER LIQUOR BEING SUPERSATURATED WITH SODIUM TETRABORATE AND ESSENTIALLY SATURATED WITH POTASSIUM CHLORIDE,
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) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |