3-substituted piperidine derivatives
CA 2088490 A1 · Owner: Cooper, David Gwyn · Inventors: Brown, Thomas Henry; Cooper, David Gwyn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of structure (I) in which R is C1-8alkyl(phenyl)p C2-8alkenyl(phenyl)p, C2-8alkynyl(phenyl)p C3-8cycloalkyl or, C1-8alkylC3-8cycloalkyl; p is 0 to 2; n is 0 to 6; A is a bond, oxygen, sulphur or NR1; R1 is hydrogen C1-8alkyl or, phenylC1-4alkyl; m is 0 to 3; and Ar is aryl or heteroaryl each , of which may be optionally substituted and salts thereof;, processes for preparing compounds (I) pharmaceutical compositions, containing them and their use in medicine in particular as calcium, blocking agents.
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 August 5, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 5, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 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.