Patent US2684285A successfully refreshed from Google Patents.
US2684285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Simplified base exchange process
Assignee: International Minerals and Chemical Corp
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Filing: 1950-06-07
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Granted: 1954-07-20
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Expires: 1970-06-07
Abstract
No abstract record available.
Inventors
- 👤 William B Dancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:28
CPC Classifications
C; C01; C01D; C01D5/00; C01D5/06; C01D5/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
A PROCESS WHICH COMPRISES EVAPORATING A POTASSIUM SULFATE MOTHER LIQUOR OBTAINED BY THE SEPARATION OF POTASSIUM SULFATE CRYSTALS FROM AN AQUEOUS REACTED MIXTURE ORIGINALLY COMPRISING ESSENTIALLY LANGBEINITE AND POTASSIUM CHLORIDE AND A SMALL BUT SIGNIFICANT AMOUNT OF SODIUM CHLORIDE JUST SHORT OF THE CRYSTALLIZATION POINT OF SODIUM CHLORIDE AT ABOUT ROOM TEMPERATURE; QUICKLY COOLING THE EVAPORATED LIQUOR TO BETWEEN ABOUT 50* AND ABOUT 60* C., THEN TO ABOUT ROOM TEMPERATURE, SEPARATING MIXED SALT CRYSTALS COMPRISING ESSENTIALLY A MAJOR AMOUNT OF POTASSIUM CHLORIDE AND A MINOR AMOUNT OF LEONITE AND
Claim 2
Dependent Claim
89 words
A PROCESS WHICH COMPRISES EVAPORATING A POTASSIUM SULFATE MOTHER LIQUOR OBTAINED BY THE SEPARATION OF POTASSIUM SULFATE CRYSTALS FROM AN AQUEOUS REACTED MIXTURE ORIGINALLY COMPRISING ESSENTIALLY LANGBEINITE AND POTASSIUM CHLORIDE AND A SMALL BUT SIGNIFICANT AMOUNT OF SODIUM CHLORIDE JUST SHORT OF THE CRYSTALLIZATION POINT OF SODIUM CHLORIDE AT ABOUT ROOM TEMPERATURE; QUICKLY COOLING THE EVAPORATED LIQUOR TO BETWEEN ABOUT 50* AND ABOUT 60* C., THEN TO ABOUT ROOM TEMPERATURE, SEPARATING MIXED SALT CRYSTALS COMPRISING ESSENTIALLY A MAJOR AMOUNT OF POTASSIUM CHLORIDE AND A MINOR AMOUNT OF LEONITE AND
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) | 1957-07-19 | 1958-01-18 | 1958-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-07-19 | 1962-01-18 | 1962-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-07-19 | 1966-01-18 | 1966-07-20 | $7700.00 | Window Closed / Lapsed |