Process for producing hydroxyalkane carboxylic acid amides
CA 2127292 A1 · Owner: Neef, Gunter · Inventors: Harre, Michael; Scholz, Stefan; Vidic, Hans-Jorg
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is described for the production of hydroxyalkane carboxylic acid amides of general formula I (I), in which, n represents a whole number from 1 to 20 and R1 and R2 each mean alkyl groups with a maximum of 8 carbon atoms or together mean an alkylene group with 4 to 8 carbon atoms optionally interrupted by an oxygen atom or a nitrogen atom from, hydroxyalkane carboxylic acids of general formula II HO-CnH2n-COOH (II), in which, n has the above-mentioned meaning and amines of general formula III, (III), in which, R1 and R2 have the above-mentioned meanings that is characterized in that, the hydroxyalkane carboxylic acid is refluxed in a one-pot reaction with 10 to 30 mol of acetyl …
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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 May 5, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 5, 2015.
- 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.