Patent EP0146697A1 successfully refreshed from Google Patents.
US2844441A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of purifying liquid silicon halide
Assignee: EIDP Inc
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Filing: 1954-11-26
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Granted: 1958-07-22
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Expires: 1974-11-26
Abstract
No abstract record available.
Inventors
- 👤 Pellin Remo Angelo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 10:06
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
A PROCESS FOR PURIFYING A LIQUID SILICON HALIDE COMPRISING EXTRACTING IMPURITIES FROM SAID HALIDE BY COMMINGLING THE SAME WITH AN IMMISCIBLE, INORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF LIQUID SULFURIC ACID AND LIQUID PHOSPHORIC ACID, SEPARATING THE SILICON HALIDE AND THE ACID CONTAINING THE EXTRACTED IMPURITIES BEFORE SUBSTANTIAL DECOMPOSITION OF THE SILICON HALIDE OCCURS, AND RECOVERING THE HYPERPURE SILICON HALIDE WHICH RESULTS.
Claim 2
Dependent Claim
63 words
A PROCESS FOR PURIFYING A LIQUID SILICON HALIDE COMPRISING EXTRACTING IMPURITIES FROM SAID HALIDE BY COMMINGLING THE SAME WITH AN IMMISCIBLE, INORGANIC ACID SELECTED FROM THE GROUP CONSISTING OF LIQUID SULFURIC ACID AND LIQUID PHOSPHORIC ACID, SEPARATING THE SILICON HALIDE AND THE ACID CONTAINING THE EXTRACTED IMPURITIES BEFORE SUBSTANTIAL DECOMPOSITION OF THE SILICON HALIDE OCCURS, AND RECOVERING THE HYPERPURE SILICON HALIDE WHICH RESULTS.
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) | 1961-07-21 | 1962-01-20 | 1962-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-07-21 | 1966-01-20 | 1966-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-07-21 | 1970-01-20 | 1970-07-22 | $7700.00 | Window Closed / Lapsed |