Patent US2914549A successfully refreshed from Google Patents.
US2914549A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkyl halosilanes by reacting silica with alkyl aluminum halides
Assignee: Imperial Chemical Industries Ltd
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Filing: 1957-09-30
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Granted: 1959-11-24
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Expires: 1977-09-30
Abstract
No abstract record available.
Inventors
- 👤 Anderson Robert Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:38
CPC Classifications
C; C07; C07F; C07F7/00; C07F7/02; C07F7/08; C07F7/12; C07F7/121; C07F7/123
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
23 words
A PROCESS FOR THE PRODUCTION OF ALKYL AND ALKYL HALOSILANES COMPRISING REACTING TOGETHER SILICA AND AN ALKYL ALUMINIUM HALIDE OF THE GENERAL FORMULA
Claim 2
Dependent Claim
23 words
A PROCESS FOR THE PRODUCTION OF ALKYL AND ALKYL HALOSILANES COMPRISING REACTING TOGETHER SILICA AND AN ALKYL ALUMINIUM HALIDE OF THE GENERAL FORMULA
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |