Partially saturated calcium channel blockers
CA 2397681 C · Owner: Neuromed Pharmaceuticals Ltd. · Inventors: Snutch, Terrance P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of formula (1a) or (1b) or the salts thereof, wherein each Z is independently N or CH but one Z , must be N; wherein n1 is 1 and n2 is 0 or 1; X1 and X2 are linkers; Ar represents one or two substituted or unsubstituted aromatic or heteroaromatic rings, and Cy represents one or two substituted or unsubstituted aliphatic cyclic or heterocyclic rings or , consists of one substituted or unsubstituted aliphatic cyclic or heterocyclic ring and one substituted or unsubstituted aromatic or heteroaromatic ring; each of Y a and Y b is two substituted or unsubstituted aromatic or heteroaromatic rings or can be , two substituted or unsubstituted aliphatic cyclic or heterocyclic rings …
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 20, 2000 and granted March 15, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 20, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 20, 2022.
- 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.