Process to produce silyl ketene acetals
CA 1332245 C · Owner: Schulz, William James, Jr. · Inventors: Speier, John Leopold; Schulz, William James, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the preparation of silyl ketene acetals of the formula, R2C=C(OSiRnX3-n)(OZ) or . The process comprises contacting an alpha-ester of a carboxylic acid with an alkali metal in the presence of an excess of an organohalosilane, wherein the alpha-ester has the formula, or, ;, and the organohalosilane has the formula RnSiX4-n; and facilitating reaction among the alpha-ester the alkali, metal and the organochlorosilane to form the silyl ketene acetal and an alkali metal halide or an alkali metal alkoxide.
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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
- Granted October 4, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 4, 2011.
- 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.