New isoxazole-sulfonamide endothelin antagonists
CA 2348847 A1 · Owner: Pacey, Michael Stephen · Inventors: Pacey, Michael Stephen; Schulz, Darren John; Chubb, Nathan Anthony Logan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Isoxazoles of formula (I) below have good affinity for endothelin receptors and are, selective for ET A over ET B. (see formula I) Such compounds are useful in the treatment of conditions mediated by endothelin.
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 May 25, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 25, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 25, 2023.
- 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.