Benzimidazoles and imidazopyridines as respiratory syncytial virus replication inhibitors
CA 2376785 A1 · Owner: Guillemont, Jerome Emile Georges · Inventors: Lacrampe, Jean Fernand Armand; Janssens, Frans Eduard; Venet, Marc Gaston
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns compounds of formula (I) prodrugs, N-oxides, addition salts, quaternary amines metal complexes and stereochemically , isomeric forms thereof wherein -a1=a2-a3=a4- represents a radical of formula - CH=CH-CH=CH-; -N=CH-CH=CH-; -CH=N-CH=CH-; -CH=CH-N=CH-; -CH=CH-CH=N-; wherein each hydrogen atom may optionally be substituted; Q is a radical of formulae (b-1), (b-2), (b-3), (b-4), (b-5), (b-6) (b-7) and (b-8), wherein Alk is C1-, 6alkanediyl; Y1 is a bivalent radical of formula -NR2- or -CH(NR2R4)-; X1 is NR4, S, S(=O), S(=O)2, O, CH2, C(=O), CH(=CH2) CH(OH), CH(CH3), CH(OCH3), CH(SCH3), CH(NR5aR5b) CH2-NR4 or NR4-CH2; X2 is a direct bond CH2, C(=O), NR4, …
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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 20, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 20, 2022.
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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.