Polymeric derivatives of camptothecins
CA 2303097 A1 · Owner: Angelucci, Francesco · Inventors: Orzi, Fabrizio; Suarato, Antonino; Caiolfa, Valeria
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Water soluble polymeric conjugates of camptothecin comprise N-(2hydroxypropyl)methacryloylamide units linked via a spacer of the formula -Gly- (CH2)n-CO-Gly wherein n = 2-8 to the C-20 position of a camptothecin residue. The conjugates possess enhanced antitumor activity and decreased toxicity with respect to the free drug. A process for their preparation and pharmaceutical compositions containing them 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 September 22, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 22, 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.
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.