Expired Canadian patentCanada
Imidazole derivatives as mdr modulators
CA 2295625 C · Owner: Zhang, Chengzhi · Inventors: Mjalli, Adnan; Zhang, Chengzhi
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to imidazole derivatives having formula (1) or its pharmaceutically acceptable salts. These compounds are useful for restoring the sensitivity of multidrug resistant cells to cancer chemotherapeutic agents.
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 6, 1998 and granted April 19, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2020.
- 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 6, 1998
GrantedApril 19, 2011
Term endedJuly 6, 2018
Patent numberCA 2295625 C
Classification (IPC)C07D233/64 +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.