Novel purine derivatives having, in particular, antiproliferative properties, and biological uses thereof
CA 2238843 C · Owner: Meijer, Laurent · Inventors: Bisagni, Emile; Meijer, Laurent; Legraverend, Michel
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2-, 6- and 9-substituted purine derivatives particularly 2-(1-R hydroxymethylpropylamino)-6-benzylamino-9-isopropylpurine having, in particular, antiproliferative properties and suitable for use as drugs and weedkillers are disclosed.
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 November 29, 1996 and granted April 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 29, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 29, 2018.
- 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.