Thermal disproportionation of organooxysilanes
CA 2082485 A1 · Owner: Bank, Howard Marvin · Inventors: Bank, Howard Marvin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a process for the thermal disproportionation of organooxysilanes containing at least one hydrogen, one organooxy and one cyclic substituent all bonded to a single silicon atom, where the cyclic substituent is selected from a group consisting of aryls substituted, aryls, cycloalkyls and substituted cycloalkyls. The process involves heating the organooxysilanes in a liquid phase to a temperature within a range of about 250°C. to 450°C. The present process is particularly useful for the disproportionation of phenyldialkoxysilanes to diphenydialkoxysilanes and cycloalkyldialkoxysilanes to dicyclodialkoxysilanes.
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 9, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 9, 2014.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.