Canadian application, no grantCanada
Cascade esters of camptothecins and methods of treating cancer using these compounds
CA 2484815 A1 · Owner: Zhisong, Cao · Inventors: Zhisong, Cao; Beppino, Giovanella C.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Cascade esters of camptothecin are described. Processes for making these compounds and for using them in cancer treatment are also described.
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 April 22, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 22, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 22, 2003
GrantedNo grant recorded
Term endedApril 22, 2023
Patent numberCA 2484815 A1
Classification (IPC)C07D491/22 +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.