Imidazo2,1-b3benzazepine derivatives, compositions and method of use
CA 2103242 C · Owner: Leenaerts, Joseph E. · Inventors: Diels, Gaston S. M.; Janssens, Frans E.; Leenaerts, Joseph E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is concerned with novel imidazo2,1-b3benzazepines of formula (I), the pharmaceutically acceptable addition salts and stereochemically isomeric forms thereof wherein each , of the dotted lines independently represents an optional bond; R1 represents hydrogen, halo C1-4alkyl or C1-4alkyloxy; R2 , represents hydrogen halo, C1-4alkyl or C1-4alky-, loxy; R3 represents hydrogen C1-4alkyl, ethenyl substituted with , hydroxycarbonyl or C1-4alkyloxycarbonyl C1-4alkyl substi-, tuted with hydroxycarbonyl or C1-4alkyloxycarbonyl hydroxyC1-4alkyl, formyl , or hydroxycarbonyl; R4 represents hydrogen, C1-4alkyl, hydroxyC1-4alkyl, phenyl or halo; R5 represents hydrogen C1-, 4alkyl or …
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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 9, 1992 and granted November 12, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 9, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 9, 2014.
- 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.