US3254010A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of silicon and germanium
Assignee: General Trustee Co Inc
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Filing: 1962-03-14
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Granted: 1966-05-31
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Expires: 1982-03-14
Abstract
No abstract record available.
Inventors
- 👤 Monnier Robert
- 👤 Barakat Dlawar
- 👤 Giacometti Jean-Claude
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 23:01
CPC Classifications
C; C22; C22B; C22B41/00; C01; C01B; C01B33/00; C01B33/02; C01B33/037; C25; C25B; C25B1/00; C25B1/01; C25B1/33; C25C; C25C3/00; C25C3/34; C25C7/00; C25C7/005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
A METHOD OF REFINING IMPURE SILICON AND GERMANIUM COMPRISING PASSING A CURRENT BETWEEN A CATHODE AND AN ANODE THROUGH A MOLTEN SALT ELECTROLYTE CONTAINING A FLUORIDE, SAID ANODE BEING COMPOSED OF A METAL OF THE CLASS CONSISTING OF IMPURE SILICON WITH NOBLER METALS THAN SILICON AND ALLOYS OF IMPURE GERMANIUM WITH NOBLER METALS THAN GERMANIUM TO DEPOSIT ON SAID CATHODE AT LEAST 99.9% PURE METAL OF THE CLASS BEING REFINED CONSISTING OF SILICON AND GERMANIUM.
Claim 2
Independent Claim
75 words
A METHOD OF REFINING IMPURE SILICON AND GERMANIUM COMPRISING PASSING A CURRENT BETWEEN A CATHODE AND AN ANODE THROUGH A MOLTEN SALT ELECTROLYTE CONTAINING A FLUORIDE, SAID ANODE BEING COMPOSED OF A METAL OF THE CLASS CONSISTING OF IMPURE SILICON WITH NOBLER METALS THAN SILICON AND ALLOYS OF IMPURE GERMANIUM WITH NOBLER METALS THAN GERMANIUM TO DEPOSIT ON SAID CATHODE AT LEAST 99.9% PURE METAL OF THE CLASS BEING REFINED CONSISTING OF SILICON AND GERMANIUM.
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) | 1969-05-30 | 1969-11-29 | 1970-05-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-30 | 1973-11-29 | 1974-05-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-30 | 1977-11-29 | 1978-05-31 | $7700.00 | Window Closed / Lapsed |