Patent US3006723A successfully refreshed from Google Patents.
US3006723A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the separation of aluminum from silicon in aluminum silicate ores
Assignee: Pennwalt Corp
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Filing: 1959-03-20
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Granted: 1961-10-31
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Expires: 1979-03-20
Abstract
No abstract record available.
Inventors
- 👤 Frederick D Loomis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:25
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
111 words
THE PROCESS FOR THE SEPARATION OF ALUMINUM FROM SILICON AS THEY OCCUR IN A HIGH SILICA ALUMINUM ORE CONTAINING ALUMINUM SILICATE AND SELECTED FROM THE GROUP CONSISTING OF BAUXITE, CLAY AND KYANITE COMPRISING REACTING THE SAID ORE WHILE IN A FINELY-DIVIDED STATE AND IN ANHYDROUS CONDITION WITH A FLUORIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL FLUORIDES AND ALKALINE EARTH METAL FLUORIDES AND WHICH METAL FORMS A WATER SOLUBLE CHLORIDE, A REDUCING AGENT AND CHLORINE, THE SAID REACTANTS BEING BROUGHT TOGETHER SIMULTANEOUSLY AND IN INTIMATE MIXTURE WHILE MAINTAINING A REACTION TEMPERATURE OF AT LEAST 600*C. UNTIL SUBSTANTIALLY ALL OF THE SILICON HAS BEEN RELEASED AS SILICON TETRAFLUORIDE.
Claim 2
Dependent Claim
111 words
THE PROCESS FOR THE SEPARATION OF ALUMINUM FROM SILICON AS THEY OCCUR IN A HIGH SILICA ALUMINUM ORE CONTAINING ALUMINUM SILICATE AND SELECTED FROM THE GROUP CONSISTING OF BAUXITE, CLAY AND KYANITE COMPRISING REACTING THE SAID ORE WHILE IN A FINELY-DIVIDED STATE AND IN ANHYDROUS CONDITION WITH A FLUORIDE OF A METAL SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL FLUORIDES AND ALKALINE EARTH METAL FLUORIDES AND WHICH METAL FORMS A WATER SOLUBLE CHLORIDE, A REDUCING AGENT AND CHLORINE, THE SAID REACTANTS BEING BROUGHT TOGETHER SIMULTANEOUSLY AND IN INTIMATE MIXTURE WHILE MAINTAINING A REACTION TEMPERATURE OF AT LEAST 600*C. UNTIL SUBSTANTIALLY ALL OF THE SILICON HAS BEEN RELEASED AS SILICON TETRAFLUORIDE.
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) | 1964-10-30 | 1965-05-01 | 1965-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-30 | 1969-05-01 | 1969-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-30 | 1973-05-01 | 1973-10-31 | $7700.00 | Window Closed / Lapsed |