Process for the hydroformylation of olefinically unsaturated compounds, in particular olefins, in the presence of cyclic carbonic esters
CA 2496838 A1 · Owner: Moeller, Oliver · Inventors: Wiese, Klaus-Diether; Moeller, Oliver; Borgmann, Cornelia
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for the production of aldehydes by catalysed hydroformylation of metals in the 8th 10th groups of the periodic table of elements of olefinically unsaturated compounds in the presence of cyclic carbonic acid esters and ligands which do not contain any sufonic acid or sulfonate groups.
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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 August 7, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 7, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 7, 2025.
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Timeline
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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.