Patent US1375876A successfully refreshed from Google Patents.
Patent US2990429A successfully refreshed from Google Patents.
US2990429A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of alkyl halides
Assignee: Imperial Chemical Industries Ltd
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Filing: 1959-12-07
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Granted: 1961-06-27
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Expires: 1979-12-07
Abstract
No abstract record available.
Inventors
- 👤 Sleddon Geoffrey John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:46
CPC Classifications
C; C07; C07C; C07C17/00; C07C17/093; C07C17/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS FOR THE PRODUCTION OF LOWER ALKYL HALIDES COMPRISING REACTING AT AN ELEVATED TEMPERATURE A COMPLEX ALUMINIUM HALIDE OF FORMULA MXNALX''3 WHERE M IS A METAL SELECTED FROM GROUPS CONSISTING OF GROUP I AND GROUP II OF VALENCY N AND X AND X'' ARE SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE, WITH A COMPOUND OF THE GENERAL FORMULA ROR'' WHERE R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF A METHYL AND ETHYL GROUP AND R'' IS SELECTED FROM THE GROUP CONSISTING OF A METHYL AND ETHYL GROUP AND HYDROGEN AND DISTILLING THEREFROM THE SO PRODUCED ALKYL HALIDE.
Claim 2
Dependent Claim
103 words
A PROCESS FOR THE PRODUCTION OF LOWER ALKYL HALIDES COMPRISING REACTING AT AN ELEVATED TEMPERATURE A COMPLEX ALUMINIUM HALIDE OF FORMULA MXNALX''3 WHERE M IS A METAL SELECTED FROM GROUPS CONSISTING OF GROUP I AND GROUP II OF VALENCY N AND X AND X'' ARE SELECTED FROM THE GROUP CONSISTING OF CHLORINE, BROMINE AND IODINE, WITH A COMPOUND OF THE GENERAL FORMULA ROR'' WHERE R IS A RADICAL SELECTED FROM THE GROUP CONSISTING OF A METHYL AND ETHYL GROUP AND R'' IS SELECTED FROM THE GROUP CONSISTING OF A METHYL AND ETHYL GROUP AND HYDROGEN AND DISTILLING THEREFROM THE SO PRODUCED ALKYL HALIDE.
References Cited (Backward Citations)
US2755316A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-26 | 1964-12-26 | 1965-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-26 | 1968-12-26 | 1969-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-26 | 1972-12-26 | 1973-06-27 | $7700.00 | Window Closed / Lapsed |