Canadian application, no grantCanada
Process for preparing aldehydes by hydroformylation of olefinically unsaturated compounds, catalyzed by unmodified complexes of metals of groups 8 to 10 of the pte in the presenceof cyclic carbonic esters
CA 2506258 A1 · Owner: Wiese, Klaus-Diether · Inventors: Hess, Dieter; Borgmann, Cornelia; Kaizik, Alfred
Overview
Drawings and full text
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 producing aldehydes by means of hydroformylation catalysed by metals of groups eight to ten of the periodic table in the presence of cyclic carbonic acid esters.
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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.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 7, 2003
GrantedNo grant recorded
Term endedAugust 7, 2023
Patent numberCA 2506258 A1
Classification (IPC)C07C45/50 +1 more
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.