Tetracyclic indole derivatives as 5-ht receptor ligands
CA 2453343 A1 · Owner: Pharmacia & Upjohn Company · Inventors: Hoffman, Robert L.; Ennis, Michael D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides compounds of formula (I) wherei n R1, R2, R3, R4, Y, b, and c have any of the values defined in the specification as well , as pharmaceutical compositions comprising the compounds. The invention also provides therapeutic methods for treating diseases wherein modulation of 5-HT activity is desired, as well as processes and intermediates useful for preparing compounds of formula I.
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, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 5, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 5, 2024.
- 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.