Actinium-225 complexes and conjugates for radioimmunotherapy
CA 2381123 C · Owner: Kiefer, Garry E. · Inventors: Kiefer, Garry E.; Mcdevitt, Michael R.; Gulyas, Gyongyi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Actinium-225 (225Ac) complexes with functionalized chelants of the formula (I) wherein: each Q is independently hydrogen or (CHR5)pCO2R; Q1 is hydrogen or (CHR5)wCO2R; each R independently is hydrogen benzyl or C1-C4 alkyl; with the , proviso that at least two of the sum of Q and Q1 must be other than hydrogen; each R5 independently is hydrogen; C1-C4 alkyl or (C1-C2 alkyl)phenyl; X and Y are each independently hydrogen or may be taken with an adjacent X and Y to form an additional carbon-carbon bond; n is 0 or 1; m is an integer from 0 to 10 inclusive; p is 1 or 2; r is 0 or 1; w is 0 or 1; with the proviso that n is only 1 when X and/or Y form an additional carbon to carbon bond …
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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 February 23, 2001 and granted October 4, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2023.
- 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.