Condensed heterocyclic compound and psychopharmaceutical composition containing same
CA 2045453 C · Owner: Suntory Limited · Inventors: Nomura, Kayoko; Shibata, Makoto; Kawai, Masanori
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A condensed heterocyclic compound having the formula (I):, wherein A and B are both carbonyl groups or one thereof represents a methylene group and the other represents a carbonyl group; Z represents an oxygen atom a sulfur, atom, a substituted or unsubstituted nitrogen atom or a, methylene group; n is an integer of 2 to 6; and R represents a group having the following formula: wherein R1 represents a hydrogen atom or a hydroxyl group; R2 represents a substituted or unsubstituted phenyl or 2-pyridyl group or salts thereof. The compounds according to the present invention exhibit a strong affinity to the .sigma.-receptor and are useful as psychopharmaceuticals.
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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 25, 1991 and granted April 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 25, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2013.
- 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.