Quaternary basic amides, method of preparing them and pharmaceutical compositions in which they are present
CA 2107432 C · Owner: Sanofi · Inventors: Proietto, Vincenzo; Gueule, Patrick; Van Broeck, Didier
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to quaternary basic amides of the formula, (see formula I) in which, - Ar is an optionally substituted monodi- or , tri-cyclic aromatic or heteroaromatic group - T is a direct bond, a hydroxymethylene group an, alkoxymethylene group in which the alkoxy group is C1-C4, or a C1-C5-alkylene group;, - Ar' is an unsubstituted or mono- or poly-substituted phenyl, a thienyl, a benzothienyl, a naphthyl or an indolyl;, - R is hydrogen or a C1-C4-alkyl or a , C1-C4-.omega.-alkoxy(C2-C4)alkyl or a C2-C4-.omega.-alkanoyloxy , (C1-C4)alkyl;. - Q is hydrogen: - or else Q and R together form a 1,2-ethylene 1,3-propylene or 1,4-butylene group:, - Am+ is the radical (see formula II), …
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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 September 30, 1993 and granted April 4, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 30, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 30, 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
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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.