Expired Canadian patentCanada
Use of parthenolide derivatives as antileukemic and cytotoxic agents
CA 2532229 C · Owner: Crooks, Peter A. · Inventors: Crooks, Peter A.; Wei, Xiaochen; Jordan, Craig T.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula having anti-tumor activity wherein R1 and R2 are as , described herein having the following formula. (see formula 2)
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 July 9, 2004 and granted September 2, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 9, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 9, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJuly 9, 2004
GrantedSeptember 2, 2014
Term endedJuly 9, 2024
Patent numberCA 2532229 C
Classification (IPC)C07D493/04 +2 more
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.