Patent US2949481A successfully refreshed from Google Patents.
US2949481A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkyl halosilanes by reacting silicates with alkyl aluminum halides
Assignee: Imperial Chemical Industries Ltd
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Filing: 1957-09-30
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Granted: 1960-08-16
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Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 Anderson Robert Craig
- 👤 Sleddon Geoffrey John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 10:33
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A PROCESS FOR THE PRODUCTION OF ALKYL AND ALKYL HALO- SILANES COMPRISING REACTING TOGETHER AN INORANGANIC SILICATE SELECTED FROM THE GROUP CONSISTING OF BENTONITE, TALC, CHINA CLAY, ABLITE FELSPAR, OLIVINE, WOLLASTONITE, MICA, CHRYSOTILE ASBESTOS, AND SODIUM SILICATE, AND AN ALKYL ALUMINUM HALIDE OF THE GENERAL FORMULA RA RB ALX 3- A- B WHERE R AND R ARE ALKYL GROUPS, X IS A HALOGEN,A IS AN INTEGER OF FROM 1 TO 2, B IS AN INTEGER OF FROM 0 TO 1 AND A+ B IS AN INTEGER OF FROM 1 TO 2.
Claim 2
Dependent Claim
91 words
A PROCESS FOR THE PRODUCTION OF ALKYL AND ALKYL HALO- SILANES COMPRISING REACTING TOGETHER AN INORANGANIC SILICATE SELECTED FROM THE GROUP CONSISTING OF BENTONITE, TALC, CHINA CLAY, ABLITE FELSPAR, OLIVINE, WOLLASTONITE, MICA, CHRYSOTILE ASBESTOS, AND SODIUM SILICATE, AND AN ALKYL ALUMINUM HALIDE OF THE GENERAL FORMULA RA RB ALX 3- A- B WHERE R AND R ARE ALKYL GROUPS, X IS A HALOGEN,A IS AN INTEGER OF FROM 1 TO 2, B IS AN INTEGER OF FROM 0 TO 1 AND A+ B IS AN INTEGER OF FROM 1 TO 2.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-16 | 1964-02-15 | 1964-08-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-16 | 1968-02-15 | 1968-08-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-16 | 1972-02-15 | 1972-08-16 | $7700.00 | Window Closed / Lapsed |