US2906599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing sodium chloride brines of high purity
Assignee: Hagan Chemicals and Controls Inc
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Filing: 1953-11-16
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Granted: 1959-09-29
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Expires: 1973-11-16
Abstract
No abstract record available.
Inventors
- 👤 Charles T Roland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:14
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/14; C01D3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
THE METHOD OF PREPARING A SODIUM CHLORIDE BRINE OF EXCEPTIONAL PURITY FROM SOLID SODIUM CHLORIDE CONTAMINATED BY CALCIUM SULFATE WHICH COMPRISES DISSOLVING THE CONTAMINATED SODIUM CHLORIDE IN WATER AT A PH VALUE ABOVE ABOUT 2.0 IN THE PRESENCE OF POLYPHOSPHATE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL POLYPHOSPHATES, ALKALINE EARTH METAL POLYPHOSPHATES, AMMONIUM POLYPHOSPHATES, AND ACID POLYPHOSPHATES AND MIXTURES THEREOF, IN AN AMOUNT WHICH IS FROM ABOUT 1 PART POLYPHOSPHATE PER MILLION PARTS OF WATER TO ABOUT 2000 PARTS POLYPHOSPHATE PER MILLION PARTS OF WATER.
Claim 2
Independent Claim
87 words
THE METHOD OF PREPARING A SODIUM CHLORIDE BRINE OF EXCEPTIONAL PURITY FROM SOLID SODIUM CHLORIDE CONTAMINATED BY CALCIUM SULFATE WHICH COMPRISES DISSOLVING THE CONTAMINATED SODIUM CHLORIDE IN WATER AT A PH VALUE ABOVE ABOUT 2.0 IN THE PRESENCE OF POLYPHOSPHATE COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL POLYPHOSPHATES, ALKALINE EARTH METAL POLYPHOSPHATES, AMMONIUM POLYPHOSPHATES, AND ACID POLYPHOSPHATES AND MIXTURES THEREOF, IN AN AMOUNT WHICH IS FROM ABOUT 1 PART POLYPHOSPHATE PER MILLION PARTS OF WATER TO ABOUT 2000 PARTS POLYPHOSPHATE PER MILLION PARTS OF WATER.
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) | 1962-09-28 | 1963-03-30 | 1963-09-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-28 | 1967-03-30 | 1967-09-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-28 | 1971-03-30 | 1971-09-29 | $7700.00 | Window Closed / Lapsed |