Patent US2812235A successfully refreshed from Google Patents.
US2812235A
Expired / Lapsed
US
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Method of purifying volatile compounds of germanium and silicon
Assignee: AT&T Inc
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Filing: 1955-09-16
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Granted: 1957-11-05
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Expires: 1975-09-16
Abstract
No abstract record available.
Inventors
- 👤 Field H Winslow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:18
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08; C01B33/107; C01B33/10778; C01B33/10794; C01B33/04; C01B33/046; C01G; C01G17/00; C01G17/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
THE METHOD OF PURIFYING VOLATILE COMPOUNDS, BOILING BELOW ABOUT 150*C., OF THOSE ELEMENTS WHICH ARE MEMBERS OF THE CLASS CONSISTING OF GERMANIUM AND SILICON, WHICH METHOD COMPRISES CONTACTING SAID VOLATILE COMPOUNDS WITH A SUBSTANCE WHICH IS A MEMBER OF THE CLASS CONSISTING OF CHLOROTRIPHENYLMETHANE AND FLUOROTRIPHENYLMETHANE, MAINTAINING SUCH CONTACT UNTIL SAID SUBSTANCE AND BORON TRICHLORIDE IMPURITIES IN SAID VOLATILE COMPOUNDS REACT TO FORM A COMPLEX, AND THEN SEPARATING SAID VOLATILE COMPOUNDS FROM THE COMPLEX.
Claim 2
Independent Claim
74 words
THE METHOD OF PURIFYING VOLATILE COMPOUNDS, BOILING BELOW ABOUT 150*C., OF THOSE ELEMENTS WHICH ARE MEMBERS OF THE CLASS CONSISTING OF GERMANIUM AND SILICON, WHICH METHOD COMPRISES CONTACTING SAID VOLATILE COMPOUNDS WITH A SUBSTANCE WHICH IS A MEMBER OF THE CLASS CONSISTING OF CHLOROTRIPHENYLMETHANE AND FLUOROTRIPHENYLMETHANE, MAINTAINING SUCH CONTACT UNTIL SAID SUBSTANCE AND BORON TRICHLORIDE IMPURITIES IN SAID VOLATILE COMPOUNDS REACT TO FORM A COMPLEX, AND THEN SEPARATING SAID VOLATILE COMPOUNDS FROM THE COMPLEX.
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) | 1960-11-04 | 1961-05-06 | 1961-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-04 | 1965-05-06 | 1965-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-04 | 1969-05-06 | 1969-11-05 | $7700.00 | Window Closed / Lapsed |