Compounds
CA 2006443 A1 · Owner: Ham, Peter · Inventors: Ham, Peter; Smith, Stephen A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (I) and pharmaceutically acceptable salts thereof:, (I), wherein Z1, Z2, Z3 and the carbon atoms to which Z1 and Z3 are attached, form a 5-membered non-aromatic heterocyclic ring;, E is absent or is (CH2)n or CH(CH2)n-1 wherein n is 1 to 4;, A is -CONH-, -NHCO-, -COO- -S(O)r- wherein r is 0 1, or 2, or -CH2-;, p is 0, 1 or 2;, q is 0 or 1; s is 0, 1, 2, 3 or 4;, Rz is hydrogen, C1-6 alkyl or when A is -CH2-, hydroxy;, Ra and Rb are independently selected from hydrogen or a substituent;, R1 is CH2R9 wherein R9 is optionally substituted aryl or heteroaryl;, R2 is CHR10R11 wherein R10 is hydrogen or methyl and R11 is C1-6 alkyl, C3-8 cycloalkyl, optionally substituted aryl …
Read the whole patent
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 December 21, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 21, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 21, 2011.
- 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.