Aryl- or heteroaryl-1-alkyl-pyrrole-2-carboxylic acid compounds useful in treating interleukin-1 mediated conditions
CA 2008616 C · Owner: Merrell Dow Pharmaceuticals Inc. · Inventors: Ku, George; Parker, Roger A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to novel aryl- or heteroaryl-1alkyl-pyrrole-2-carboxylic acid compounds useful in treating interleukin-1 mediated conditions. These compounds are of the formula:, (See fig I), wherein (C1-C6) is a straight or branched alkyl chain consisting of from 1 to 6 carbon atoms and X is phenyl naphthyl, or biphenyl, each optionally substituted with one two or three substituents selected from the group consisting of C1-C4 alkyl (with the proviso that when X is unsubstituted phenyl, (C1-C6) must be other than methylene one or an ethylene bridge, and when X is unsubstituted naphthyl (C1-C6) must be other than methylene, and with the proviso that when X is substituted phenyl …
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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 January 25, 1990 and granted July 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 25, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 25, 2012.
- 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.