Glycoconjugates from modified camptothecin derivates (20-o-linkage)
CA 2267328 A1 · Owner: Sperzel, Michael · Inventors: Lerchen, Hans-Georg; Sperzel, Michael; Von Dem Bruch, Karsten
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are glycoconjugates from modified camptothecin derivates where at , least a glucidic component is linked to the 20-hydroxyl group of a camptothecin derivate. Also disclosed are their preparation and their use as pharmaceutical products, especially against cancer diseases.
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 17, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 17, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 17, 2019.
- 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.