US3775457A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing alkoxysilanes
Assignee: Toshiba Corp
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Filing: 1972-09-26
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Granted: 1973-11-27
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Expires: 1992-09-26
Abstract
Abstract A METHOD OF MANUFACTURING ALKOXYSILANES WHICH COMPRISES HOLDING A CUPROUS CHLORIDE CATALYST AND FINELY DIVIDED SILICON IN A SUSPENDED STATE IN A SYNTHETIC OIL CONTAINING MULTICYCLIC AROMATIC HYDROCARBONS CONSISTING OF TWO TO FOUR RINGS WHICH COLLECTIVELY INCLUDE ONE TO FOUR ALKYL GROUPS EACH HAVING LESS THAN FOUR CARBON ATOMS, ADDING A MATERIAL REPRESENTED BY A CHEMICAL FORMULA ROH (WHERE R DENOTES AN ALKYUL GROUP HAVING LESS THAN FOUR CARBON ATOMS) TO SAID SUSPENSION AT A TEMPERATURE OF 100 TO 300*C. FOR REACTION WITH SILICON, THEREBY OBTAINING ALKOXYSILANES EXPRESSED BY A GENERAL FORMULA HNSI(OR)4-N(WHERE N IS AN INTEGER OF 0 TO 3).
Inventors
- 👤 H Muraoka
- 👤 M Asano
- 👤 T Ohashi
- 👤 H Yoshida
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 07:59
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/025; C07F7/04; C07F7/08; C07F7/0834
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-26 | 1977-05-28 | 1977-11-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-26 | 1981-05-28 | 1981-11-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-26 | 1985-05-28 | 1985-11-27 | $7700.00 | Window Closed / Lapsed |