Piperidine derivatives having anxiolytic effect
CA 2111204 C · Owner: H. Lundbeck A/S · Inventors: Moltzen, Ejner K.; Perregaard, Jens Kristian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Piperidine compounds having the general formula (I) wherein R1 is a) a group , consisting of alkyl alkenyl, cycloalkyl, cycloalkenyl, phenyl cycloalkylalkyl, cycloalkenylalkyl, phenylalkyl or diphenylalkyl linked to the piperidyl N-atom through an at least 2-membered spacer group or; b) a group having general formula (II), wherein X is CHR10, O, S SO, SO2 or NR10, i) Z1 and Z2 are linked together in which case: Z1 is CH2 O or , S; Z2 and Z3 are independently (CH2)n n being, 0 or 1, O or S or Z1 and Z2 may together represent a group -CH = CH-; or when Z3 is (CH2)n wherein n is 0, Z1 and Z2 may together represent a 3-membered divalent group; or ii) when R1 is a group as defined in b) Z1 …
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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 12, 1992 and granted February 27, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2014.
- 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.