Piperidine compounds, method for preparation thereof, and a pharmaceutical composition comprising the same
CA 2038417 A1 · Owner: Hokuriku Pharmaceutical Co. Ltd. · Inventors: Ito, Yasuo; Sakaguchi, Jun; Ogawa, Nobuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel piperidine compounds represented by the following formula (I):, (I), wherein Y represents an alkylene group having 1 to 7 carbon atoms; A is a group represented by formula I-a or formula I-b: (1-a) , (I-b), wherein X represents -CH,-S- or -S-; and R represents a hydrogen atom or a lower alkyl group with a proviso that A is a group represented by formula I-a, or R represents a hydrogen atom with a proviso that A is a group represented by formula I-b and pharmacologically acceptable salts thereof are disclosed. Also disclosed are a method for preparing the same; a pharmaceutical composition comprising the same; an antiallergic agent and an agent for bronchial asthma comprising the same; …
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 March 15, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 15, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 15, 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.