Imidazole, triazole and tetrazole derivatives
CA 2129146 A1 · Owner: Street, Leslie Joseph · Inventors: Routledge, Helen; Sternfeld, Francine; Reeve, Austin John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A class of substituted imidazole triazole and tetrazole, derivatives of formula (I) wherein the broken circle represents two non-adjacent double bonds in any position in the five-membered ring; two, three or four of V,W,X,Y and Z represent nitrogen and the remainder represent carbon provided that when two of V,W,X,Y and Z, represent nitrogen and the remainder represent carbon then the , said nitrogen atoms are in non-adjacent positions within the five-membered ring; E represents a bond or a straight or branched alkylene chain containing from 1 to 4 carbon atoms; F represents a group of formula (II); U represents nitrogen or C-R2; B represents oxygen, sulphur or N-R3; are selective agonists …
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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 March 5, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 5, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 5, 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
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.