2,4-diaminopyrimidine derivatives
CA 2254117 C · Owner: Basilea Pharmaceutica Ag · Inventors: Wyss, Pierre-Charles; Guerry, Philippe; Stalder, Henri
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is concerned with compounds of general formula (I) wherein R1 signifies lower-alkoxy, R2 signifies bromine lower-alkoxy or , hydroxy, R3 signifies hydrogen lower-alkyl, cycloalkyl, aryl, heteroaryl aralkyl, heteroaralkyl or cyano, R4 and R5 each independently signify hydrogen, lower-alkyl, lower-alkoxy, halogen hydroxy, amino, di(lower alkyl)-, amino cyano or nitro and Q signifies ethynylene or vinylene pharmaceutically , usable salts thereof the use of these compounds and their salts as therapeutically active substances; medicaments based on these substances and their production; the use of these substances as medicaments and for the production of …
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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 7, 1997 and granted March 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 7, 2019.
- 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.