2-(piperidin-4-yl, pyridin-4-yl and tetrahydropyridin-4-yl)benzofuran-7-ol and carbamate derivatives
CA 2129462 A1 · Owner: Hoechst-Roussel Pharmaceuticals Inc. · Inventors: Hedtmann, Udo; O'Malley, Gerard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
These are disclosed novel 2-(piperidin-4-yl,pyridin-4-yl and tetrahydropyridin-4-yl)benzofuran-7-ol and carbamate derivatives of the formula where the substituents are as defined in the speification which are useful as, acelylcholinesterase inhibitors ann as such may be useful for Ihe treatmeant of Alzheimer's disease and other senile dementias.
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 4, 1994. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 4, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 4, 2016.
- 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.