Liquid preparation comprising camptothecin derivative and pharmaceutical composition producible by lyophilizing the preparation
CA 2480425 A1 · Owner: Narisawa, Shinji · Inventors: Narisawa, Shinji; Ito, Takahiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a stable liquid preparation comprising a camptothecin derivative which is prepared by binding a compound of the formula I:wherein R1 is a substituted or unsubstituted lower alkyl group X1 is a , group of the formula: -NHR2 (R2 is a hydrogen atom or a lower alkyl group) or a hydroxy group and Alk is a straight or branched chain alkylene group optionally interrupted by an oxygen atom and a polysaccharide having carboxyl , groups via an amino acid or a peptide or a pharmaceutically acceptable salt thereof, which is adjusted to pH 5-8, or a stable pharmaceutical composition produced by lyophilizing said liquid preparation.
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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 15, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 15, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 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.
Timeline
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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.