US2982620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing silicon tetrachloride
Assignee: Cabot Corp
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Filing: 1956-09-07
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Granted: 1961-05-02
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Expires: 1976-09-07
Abstract
No abstract record available.
Inventors
- 👤 Robert D Beattie
- 👤 Johnson E Vivian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:34
CPC Classifications
C; C01; C01B; C01B33/00; C01B33/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
132 words
A PROCESS FOR PRODUCING SILICON TETRACHLORIDE WHICH COMPRISES INTRODUCING INTO A POROUS BED OF GRANULAR SILICON CARBIDE HEATED TO REACTION TEMPERATURES OF AT LEAST ABOUT 1800* F., A REACTANT STREAM CONTAINING AS THE ONLY INGREDIENT PRESENT IN SIGNIFICANT AMOUNTS WHICH IS STRONGLY REACTIVE WITH SILICON CARBIDE, CHLORINE, AND, IN A RATIO OF AT LEAST 0.25 MOL PER MOL OF CHLORINE INTRODUCED, CHLORIDES OF ELEMENTS FROM THE GROUP CONSISTING OF ANTIMONY, GERMANIUM, SILICON, TITANIUM AND TIN, BOTH THE REACTANT STREAM AND SUBSTANTIALLY ALL OF SAID CHLORIDES BEING INTRODUCED IN THE VAPOR STATE IN SUBSTANTIALLY UNIFORM DISTRIBUTION ACROSS THE FULL CROSS SECTION OF SAID BED, THE TEMPERATURE OF SAID CHLORIDES, AS INTRODUCED, BEING SUBSTANTIALLY LOWER THAN 1800* F., THEREBY EFFECTING A CONTROLLED EXOTHERMIC REACTION BETWEEN THE CHLORINE AND SILICON CARBIDE TO PRODUCE SILICON TETRACHLORIDE.
Claim 2
Dependent Claim
132 words
A PROCESS FOR PRODUCING SILICON TETRACHLORIDE WHICH COMPRISES INTRODUCING INTO A POROUS BED OF GRANULAR SILICON CARBIDE HEATED TO REACTION TEMPERATURES OF AT LEAST ABOUT 1800* F., A REACTANT STREAM CONTAINING AS THE ONLY INGREDIENT PRESENT IN SIGNIFICANT AMOUNTS WHICH IS STRONGLY REACTIVE WITH SILICON CARBIDE, CHLORINE, AND, IN A RATIO OF AT LEAST 0.25 MOL PER MOL OF CHLORINE INTRODUCED, CHLORIDES OF ELEMENTS FROM THE GROUP CONSISTING OF ANTIMONY, GERMANIUM, SILICON, TITANIUM AND TIN, BOTH THE REACTANT STREAM AND SUBSTANTIALLY ALL OF SAID CHLORIDES BEING INTRODUCED IN THE VAPOR STATE IN SUBSTANTIALLY UNIFORM DISTRIBUTION ACROSS THE FULL CROSS SECTION OF SAID BED, THE TEMPERATURE OF SAID CHLORIDES, AS INTRODUCED, BEING SUBSTANTIALLY LOWER THAN 1800* F., THEREBY EFFECTING A CONTROLLED EXOTHERMIC REACTION BETWEEN THE CHLORINE AND SILICON CARBIDE TO PRODUCE SILICON TETRACHLORIDE.
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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |