(s)(+)-2-ethoxy-4-n-{1-(2-piperidino-phenyl)-3-methyl-1-butylaminocarbonylmethylbenzoic acid
CA 2111851 C · Owner: Greischel, Andreas · Inventors: Rupprecht, Eckhard; Greischel, Andreas; Grell, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present application relates to the new (S) (+)-2ethoxy-4-N-1-(2-piperidino-phenyl)-3-methyl-1-butylaminocarbonylmethyl-benzoic acid and the salts thereof which, have valuable pharmacological properties namely an effect on, the intermediate metabolism but particularly the effect of, lowering blood sugar. The (S)-enantiomer has the general formula: (see formula I) , wherein, W' represents a carboxy group or an alkoxycarbonyl group having a total of 2 to 5 carbon atoms wherein the alkyl, moiety of the alkoxy group may be substituted by a phenyl group. The invention also relates to the new intermediate products of formulae I, III, IV, and VII and the addition salts thereof. The …
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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 June 21, 1991 and granted February 26, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 2013.
- 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.