Dopamine receptor ligands and imaging agents
CA 2011745 C · Owner: Murphy, Raymond · Inventors: Kung, Hank F.; Murphy, Raymond
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel CNS dopamine D-2 receptors of the formulae (see fig. I) (see fig. II), where, Y and Y' are independently selected from the group consisting of hydrogen, C1-C5 alkyl; C1-C5 alkenyl and C1-C5 alkynyl;, Z is selected from the group consisting of halogen (Hal) CH=CH-Hal; C1-C10 alkylene-Hal; C1-C10 alkylene-CH=CH-Hal; C1-C10 alkylene-phenyl-Hal; C1-C10 alkylene-heteroaryl-Hal; provided that, in Compounds of Formula I Hal is a radioactive, iodine atom; and A is an alkylene moiety of from two to eight carbon atoms, are disclosed. An example of such a compound is 5-iodo-7-N-(1-ethyl-2-pyrrolidinyl)methylcarboxamide-2,3dihydrobenzofuran. These compounds are useful as imaging agents for D-2 …
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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 8, 1990 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 8, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2012.
- 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
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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.