Angiogenesis inhibitors
CA 2403903 A1 · Owner: Takeda Chemical Industries, Ltd. · Inventors: Hazama, Masatoshi; Sugiyama, Yasuo; Miyazaki, Takeshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Neovascularization inhibitors containing compounds of the general formula (II) or salts thereof are useful as preventive and therapeutic drugs for tumors and so on, wherein R4 is an optionally substituted hydrocarbon group or the like; Xa is a free valency or the like; k is an integer of 1 to 3; Ya is oxygen or the like; ring Ea is a benzene ring which may have an additional substituent; p is an integer of 1 to 8; R5 is hydrogen or the like; q is an integer of 0 to 6; r is 0 or 1; R8 is hydroxyl or the like; and R6 and R7 are each hydrogen or the like.
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 March 27, 2001. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 27, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 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.