US3405043A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing silicon and electrolytic cell therefor
Assignee: General Trustee Co Inc
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Filing: 1965-07-30
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Granted: 1968-10-08
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Expires: 1985-07-30
Abstract
No abstract record available.
Inventors
- 👤 Barakat Dlawar
- 👤 Keller Hans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:34
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/02; C25; C25B; C25B1/00; C25B1/01; C25B1/33; C25B9/00; C25B9/17
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A METHOD OF PRODUCING SILICON COMPRISING INTRODUCING AN ELECTROLYTE COMPRISING MOLTEN CRYOLITE INTO A CAVITY IN A MOLD COMPOSED PRINCIPALLY OF FINELY DIVIDED SILICA, DISSOLVING APPROXIMATELY 3% TO 10% SILICA IN SAID MOLTEN CRYOLITE AND MAINTAINING SAID MOLTEN CRYOLITE AND DISSOLVED SILICA AT A TEMPERATURE BETWEEN ABOUT 970* AND 1400*C., PASSING A DIRECT CURRENT THROUGH SAID ELECTROLYTE BETWEEN AN ANODE AND A CATHODE IMMERSED IN SAID ELECTROLYTE TO REDUCE SAID DISSOLVED SILICA TO SILICON AND DEPOSIT SAID SILICON ON SAID CATHODE.
Claim 2
Independent Claim
81 words
A METHOD OF PRODUCING SILICON COMPRISING INTRODUCING AN ELECTROLYTE COMPRISING MOLTEN CRYOLITE INTO A CAVITY IN A MOLD COMPOSED PRINCIPALLY OF FINELY DIVIDED SILICA, DISSOLVING APPROXIMATELY 3% TO 10% SILICA IN SAID MOLTEN CRYOLITE AND MAINTAINING SAID MOLTEN CRYOLITE AND DISSOLVED SILICA AT A TEMPERATURE BETWEEN ABOUT 970* AND 1400*C., PASSING A DIRECT CURRENT THROUGH SAID ELECTROLYTE BETWEEN AN ANODE AND A CATHODE IMMERSED IN SAID ELECTROLYTE TO REDUCE SAID DISSOLVED SILICA TO SILICON AND DEPOSIT SAID SILICON ON SAID CATHODE.
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) | 1971-10-08 | 1972-04-08 | 1972-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-10-08 | 1976-04-08 | 1976-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-10-08 | 1980-04-08 | 1980-10-08 | $7700.00 | Window Closed / Lapsed |