Imidazo1,2-a(pyrrolo, thieno or furano)3,2-dazepine derivatives, compositions and methods of use
CA 2102889 C · Owner: Diels, Gaston S. M. · Inventors: Diels, Gaston S. M.; Leenaerts, Joseph E.; Janssens, Frans 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 imidazo1,2-a(pyrrolo thieno , or furano)3,2-dazepines 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 C1-4alkyl, halo, ethenyl substituted with hydroxycarbonyl or C1-4alkyloxycarbonyl, hydroxyC1-4alkyl formyl, hydroxycarbonyl or , hydroxycarbonylC1-4alkyl; R2 represents hydrogen C1-4alkyl, ethenyl substituted with hydroxycarbonyl or C1-4alkyloxycarbonyl C1-4alkyl substituted with hydroxycarbonyl or C1-4alkyloxycarbonyl, hydroxyC1-4alkyl formyl or hydroxycarbonyl; R3 , represents hydrogen …
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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 26, 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.