Patent US3216784A successfully refreshed from Google Patents.
US3216784A
Expired / Lapsed
US
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Purification of halogenated derivatives of silicon and germanium
Assignee: Pechiney SA
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Filing: 1961-03-06
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Granted: 1965-11-09
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Expires: 1981-03-06
Abstract
No abstract record available.
Inventors
- 👤 Gauguin Roland
- 👤 Nury Georges
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:22
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08; C01B33/04; C01B33/107; C01G; C01G17/00; C01G17/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
PROCESS FOR REMOVING SUBSTANTIALLY COMPLETELY IMPURITIES COMPRISING METALLIC COMPOUNDS CONTAINED IN LIQUID HALOGENATED COMPOUNDS OF SEMI-CONDUCTOR ELEMENTS BELONGING TO THE GROUP CONSISTING OF SILICON AND GERMANIUM, COMPRISING THE FOLLOWING STEPS: CONTACTING THE HALOGENATED COMPOUND TO BE PURIFIED WITH AN EXCESS OF TRIPHENYLCARBINOL, (C6H5)3COH, TO THEREBY PRECIPITATE A SOLID, STABLE, SUBSTANTIALLY NON-VOLATILE ADDITION COMPLEX OF SAID CARBINOL AND THE IMPURITIES TO BE REMOVED; DISTILLING THE REACTION MIXTURE TO THEREBY SEPARATE THE PURIFED HALOGENATED COMPOUND FROM THE PRECIPITATED COMPLEX AND EXCESS TRIPHENYLCARBINOL, AND RECOVERING THE HALOGENATED COMPOUND SUBSTNATIALLY FREE OF SAID IMPURITIES.
Claim 2
Dependent Claim
90 words
PROCESS FOR REMOVING SUBSTANTIALLY COMPLETELY IMPURITIES COMPRISING METALLIC COMPOUNDS CONTAINED IN LIQUID HALOGENATED COMPOUNDS OF SEMI-CONDUCTOR ELEMENTS BELONGING TO THE GROUP CONSISTING OF SILICON AND GERMANIUM, COMPRISING THE FOLLOWING STEPS: CONTACTING THE HALOGENATED COMPOUND TO BE PURIFIED WITH AN EXCESS OF TRIPHENYLCARBINOL, (C6H5)3COH, TO THEREBY PRECIPITATE A SOLID, STABLE, SUBSTANTIALLY NON-VOLATILE ADDITION COMPLEX OF SAID CARBINOL AND THE IMPURITIES TO BE REMOVED; DISTILLING THE REACTION MIXTURE TO THEREBY SEPARATE THE PURIFED HALOGENATED COMPOUND FROM THE PRECIPITATED COMPLEX AND EXCESS TRIPHENYLCARBINOL, AND RECOVERING THE HALOGENATED COMPOUND SUBSTNATIALLY FREE OF SAID IMPURITIES.
References Cited (Backward Citations)
GB834380A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-08 | 1969-05-10 | 1969-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-08 | 1973-05-10 | 1973-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-08 | 1977-05-10 | 1977-11-09 | $7700.00 | Window Closed / Lapsed |