R(-)3-quinuclidinol derivatives
CA 2019251 A1 · Owner: Bietti, Giuseppe · Inventors: Bietti, Giuseppe; Doods, Henri N.; Cereda, Enzo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pharmacologically active R(-)3-quinuclidinol derivatives of the following formula are described (I), wherein, R represents a linear or branched lower alkyl group a cycloalkyl C1-2alkyl or an aralkyl group or is, absent;, X- represents the anion of an organic or inorganic acid, or, when R is absent, is itself absent; R1 represents a hydrogen atom, a linear or branched lower alkyl group or an acyl group of the type R2- CO, in which R2 represents a hydrogen atom or a linear or branched lower alkyl group;, A represents a cycloalkyl group an aromatic ring or, a 5- or 6-membered heterocyclic ring; Y and Z may each be present or absent; when they are both present, they each represent oxygen; when …
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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 19, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 19, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 19, 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
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.