Alkene carboxylic acid derivatives, method of preparation thereof and pharmaceutical compositions containing them
CA 2096293 C · Owner: Verbeuren, Tony · Inventors: Verbeuren, Tony; Laubie, Michel; Lavielle, Gilbert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula (I) : (see Fig. I) wherein: R1 and R2 identical or different, represent a linear or branched alkyl group (C1-C6) a substituted or unsubstituted phenyl group a pyridinyl group, a thienyl group, or form with the carbon atom to which they are attached a substituted or unsubstituted cycloalkyl cycle (C4-C7); R3 represents a substituted or unsubstituted phenylsulfonyl group a linear or branched alkyl group (C1-C6) an alkylaminocarbonyl group, or a linear or branched acyl group (C1-C6); R4 represents one of the groups CH CH (CH2)p C02H or CH2 CH2 (CH2)p C02H in which p is equal to 0, 1, 2 or 3, n and m identical or different, represent 0, 1 or 2 their isomers, …
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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 14, 1993 and granted March 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 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.