Patent US2887501A successfully refreshed from Google Patents.
US2887501A
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Preparation of higher alkylated alkyl halogenosilanes
Assignee: General Electric Co
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Filing: 1956-12-26
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Granted: 1959-05-19
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Expires: 1976-12-26
Abstract
No abstract record available.
Inventors
- 👤 Ben A Bluestein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:21
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
THE PROCESS FOR PREPARING METHYLCHLOROSILANES CONTAINING SUBSTANTIAL QUANTITIES OF TRIMETHYLCHLOROSILANE AND TETRAMETHYLSILANE, WHICH PROCESS COMPRISES EFFECTING REACTION AT AN ELEVATED TEMPERATURE OF FROM 300 TO 375* C. IN THE PRESENCE OF HYDROGEN CHLORIDE BETWEEN METHYL CHLORIDE AND A MIXTURE OF SILICON AND CALCIUM WHERE THE CALCIUM COMPRISES, BY WEIGHT, FROM 10 TO 80% OF THE WEIGHT OF THE CALCIUM AND THE SILICON, SAID HYDROGEN CHLORIDE BEING PRESENT IN AN AMOUNT EQUAL TO FROM 5 TO 25% BY WEIGHT BASED ON THE WEIGHT OF THE METHYL CHLORIDE.
Claim 2
Dependent Claim
86 words
THE PROCESS FOR PREPARING METHYLCHLOROSILANES CONTAINING SUBSTANTIAL QUANTITIES OF TRIMETHYLCHLOROSILANE AND TETRAMETHYLSILANE, WHICH PROCESS COMPRISES EFFECTING REACTION AT AN ELEVATED TEMPERATURE OF FROM 300 TO 375* C. IN THE PRESENCE OF HYDROGEN CHLORIDE BETWEEN METHYL CHLORIDE AND A MIXTURE OF SILICON AND CALCIUM WHERE THE CALCIUM COMPRISES, BY WEIGHT, FROM 10 TO 80% OF THE WEIGHT OF THE CALCIUM AND THE SILICON, SAID HYDROGEN CHLORIDE BEING PRESENT IN AN AMOUNT EQUAL TO FROM 5 TO 25% BY WEIGHT BASED ON THE WEIGHT OF THE METHYL CHLORIDE.
References Cited (Backward Citations)
US2427605A
Cited
US2488487A
Cited
US2478493A
Cited
US2483373A
Cited
GB708823A
Cited
FR1046295A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-05-18 | 1962-11-17 | 1963-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-18 | 1966-11-17 | 1967-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-18 | 1970-11-17 | 1971-05-19 | $7700.00 | Window Closed / Lapsed |