5-ht2b receptor antagonists
CA 2472763 A1 · Owner: Oxford, Alexander William · Inventors: Oxford, Alexander William; Coleman, Robert Alexander; Borman, Richard Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention concerns compounds of formula (I): wherein R1~ is selected from the group consisting of H and optionally substituted C ~1-6 , alkyl C ~3-7 cycloalkyl, C ~3-7 cycloalkyl-C ~1-4 alkyl and phenyl-C ~1-4 , alkyl;R2~ and R3~ are either: (i) independently selected from H R, R', SO~2R, C(=O)R, (CH~2)~nNR5~R6~, where n is from 1 to 4 and R5~ and R6~ are independently selected from H and R, where R is optionally substituted C ~1-4 alkyl group, and R' is an optionally substituted phenyl- C ~1-4 alkyl group or (ii) together with the nitrogen atom to which they are attached form an , optionally substituted C ~5-7 heterocyclic group; R4~ is an optionally substituted C ~9-14 …
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 February 11, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended February 11, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 11, 2025.
- 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.