Patent US3057691A successfully refreshed from Google Patents.
US3057691A
Expired / Lapsed
US
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Method for producing silicon
Assignee: OI Glass Inc
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Filing: 1961-01-03
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Granted: 1962-10-09
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Expires: 1981-01-03
Abstract
No abstract record available.
Inventors
- 👤 Veres Frank
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:28
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
THE PROCESS FOR INCREASING THE YIELD OF ELEMENTAL SILICON FROM A GLASS COMPOSITION COMPRISING MELTING SAID GLASS COMPOSITION, ADDING ALUMINUM CHUNKS TO THE MOLTEN GLASS, SAID GLASS IN THE RESULTING MOLTEN MIXTURE BEING IN EXCESS BY WEIGHT OF SAID ALUMINUM, MAINTAINING THE MIXTURE THUS FORMED IN A MOLTEN CONDITION FOR A PERIOD OF TIME SUFFICIENT TO FORM A SILICON-ALUMINUM ALLOY, REMOVING SAID SILICON-ALUMINUM ALLOY, TREATING SAID ALLOY WITH AN ACID WHICH IS A SOLVENT FOR ALUMINUM BUT WHICH IS INERT TO SILICON, AND RECOVERING THE REMAINING INSOLUBLE COMPONENT AS ELEMENTAL SILICON.
Claim 2
Dependent Claim
91 words
THE PROCESS FOR INCREASING THE YIELD OF ELEMENTAL SILICON FROM A GLASS COMPOSITION COMPRISING MELTING SAID GLASS COMPOSITION, ADDING ALUMINUM CHUNKS TO THE MOLTEN GLASS, SAID GLASS IN THE RESULTING MOLTEN MIXTURE BEING IN EXCESS BY WEIGHT OF SAID ALUMINUM, MAINTAINING THE MIXTURE THUS FORMED IN A MOLTEN CONDITION FOR A PERIOD OF TIME SUFFICIENT TO FORM A SILICON-ALUMINUM ALLOY, REMOVING SAID SILICON-ALUMINUM ALLOY, TREATING SAID ALLOY WITH AN ACID WHICH IS A SOLVENT FOR ALUMINUM BUT WHICH IS INERT TO SILICON, AND RECOVERING THE REMAINING INSOLUBLE COMPONENT AS ELEMENTAL SILICON.
References Cited (Backward Citations)
US1386227A
Cited
US2469418A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-10-08 | 1966-04-09 | 1966-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-10-08 | 1970-04-09 | 1970-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-10-08 | 1974-04-09 | 1974-10-09 | $7700.00 | Window Closed / Lapsed |