Process for the selective preparation of alkenecarboxylic acid derivatives
CA 1292475 C · Owner: Shell Canada Limited · Inventors: Drent, Eit
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for the selective carbonylation of conjugated dienes in the presence of a hydroxyl group containing compound such as water, alcohol, phenol or carboxylic acid in the liquid phase, characterized in that this carbonylation is carried out in the presence of a specific substantially organic nitrogen-containing base-free catalyst system, that can be formed by the combination of (a) a palladium compound and, (b) at least one multidentate organic phosphorus ligand.
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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 November 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2008.
- 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.