Carboxylic acid derivative
CA 2482392 A1 · Owner: Suga, Yoichiro · Inventors: Shibuya, Masabumi; Suga, Yoichiro; Saito, Shuji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound which is useful as a VEGF receptor antagonist and has excellent properties. It is a carboxylic acid derivative represented by the formula (1) wherein ring A represents a benzene ring naphthalane ring, etc.; W , represents C1-5 alkylene; Z represents a single bond or phenylene; R1 and R2 are the same or different and each represents hydrogen halogeno, C1-5 alkyl, or C1-10 alkoxy; R3 represents hydrogen halogeno, C1-12 alkyl, C2-5 alkynyl, trifluoromethyl acetynyl, cyano, nitro, -CH2-R6, -Y-R11 etc.; R4 represents , a group represented by the formula (2) and R5 represents hydrogen or C1-5 alkyl or a pharmaceutically acceptable salt of the derivative.
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 26, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 26, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 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.