1,7naphthyridines as pde4 inhibitors
CA 2505405 A1 · Owner: Press, Neil John · Inventors: Keller, Thomas Hugo; Denholm, Alastair; Mccarthy, Clive
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of Formula (I) in free or salt form wherein R1, R2 and R3 have the , meanings as indicated in the specification are useful for treating conditions , mediated by of phosphodiesterase type 4 or the down-regulation or inhibition of TNF-.alpha. release, particularly obstructive or inflammatory airways diseases. Pharmaceutical compositions that contain the compounds and processes for preparing the compounds are also described.
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 December 15, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 15, 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.