Derivatives of benzofuran, benzothiophene, indole and indolizine, process for their preparation as well as the compositions containing them
CA 2047773 C · Owner: Chatelain, Pierre · Inventors: Rosseels, Gilbert; Chatelain, Pierre; Kilenyi, Steven
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The subject of the invention is benzofuran benzothiophene, indole or indolizine compounds of general formula: (see formula I), in which:, Het represents one of the groups: (see formula II)~ (see formula III), (see formula IV) in which, T,T' and T" represent particularly a group: (see formula V) X represent -O- or -S-, Y represents a radical (see formula VI) (see formula VII) or CH2. 106, These compounds are useful as medecines particularly for the treatment of pathological syndroms of the cardio-vascular system.
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 July 24, 1991 and granted September 12, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 24, 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.