Patent US2737442A successfully refreshed from Google Patents.
US2737442A
Expired / Lapsed
US
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Process for producing sodium fluoride from an alkaline earth fluoride
Assignee: Sinclair Manufacturing Co
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Filing: 1955-02-21
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Granted: 1956-03-06
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Expires: 1975-02-21
Abstract
No abstract record available.
Inventors
- 👤 George L Cunningham
- 👤 Jr John M Finn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:16
CPC Classifications
C; C01; C01D; C01D3/00; C01D3/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A PROCESS FOR PRODUCING SODIUM FLUORIDE COMPRISING: REACTING AN ALKALINE EARTH FLUORIDE WITH AT LEAST ONE POTASSIUM COMPOUND OF THE GROUP CONSISTING OF POTASSIUM SILICATE, POTASSIUM ALUMINATE AND POTASSIUM FERRITE IN A FUSED BATH COMPRISING THE POTASSIUM COMPOUND AND THE ALKALINE EARTH FLUORIDE, SEPARATING THE ALKALINE EARTH COMPOUND AS FORMED FROM THE REMAINDER OF THE MELT BY QUENCHING THE MELT IN SUFFICIENT WATER TO DISSOLVE MOST OF THE MELT BUT INSUFFICIENT TO DISSOLVE THE ALKALINE EARTH COMPOUND SEPARATING THE UNDISSOLVED ALKALINE EARTH COMPOUND FROM THE AQUEOUS SOLUTION OF THE REMAINDER OF THE MELT, REACTING THE AQUEOUS SOLUTION OF THE REMAINING MELT CONSTITUENTS WITH SODIUM CARBONATE TO PRODUCE SODIUM FLUORIDE AND RECOVERING THE SODIUM FLUORIDE.
Claim 2
Dependent Claim
114 words
A PROCESS FOR PRODUCING SODIUM FLUORIDE COMPRISING: REACTING AN ALKALINE EARTH FLUORIDE WITH AT LEAST ONE POTASSIUM COMPOUND OF THE GROUP CONSISTING OF POTASSIUM SILICATE, POTASSIUM ALUMINATE AND POTASSIUM FERRITE IN A FUSED BATH COMPRISING THE POTASSIUM COMPOUND AND THE ALKALINE EARTH FLUORIDE, SEPARATING THE ALKALINE EARTH COMPOUND AS FORMED FROM THE REMAINDER OF THE MELT BY QUENCHING THE MELT IN SUFFICIENT WATER TO DISSOLVE MOST OF THE MELT BUT INSUFFICIENT TO DISSOLVE THE ALKALINE EARTH COMPOUND SEPARATING THE UNDISSOLVED ALKALINE EARTH COMPOUND FROM THE AQUEOUS SOLUTION OF THE REMAINDER OF THE MELT, REACTING THE AQUEOUS SOLUTION OF THE REMAINING MELT CONSTITUENTS WITH SODIUM CARBONATE TO PRODUCE SODIUM FLUORIDE AND RECOVERING THE SODIUM FLUORIDE.
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) | 1959-03-06 | 1959-09-05 | 1960-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-06 | 1963-09-05 | 1964-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-06 | 1967-09-05 | 1968-03-06 | $7700.00 | Window Closed / Lapsed |