Bifunctional tridentate pyrazolyl containing ligands for re, tc and mn tricarbonyl complexes
CA 2522326 C · Owner: Rocha Paulo, Antonio M. · Inventors: Rocha Paulo, Antonio M.; Vitor, Rute; Alves, Susana
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 chelating agent of the general formula: (I), wherein m is 0 or 1; X is NR4 or S; Y is SR5 NHR5 or P(R5)2; R1 and R3 , are the same or different and are selected from H alkyl or aryl; R2 is H, COOH, NHR6 or (CH2)nCOOR6; R4 is H alkyl, aryl, (CH2)nCOOR6 or (CH2)nOR6; R5 is H, alkyl, aryl, (CH2)nCOOR6 or (CH2)nOR6 R6 is H, alkyl or aryl; n is 1, 2, 3, 4 5, 6, 7, 8, 9 or 10; and when R1=R3=CH3 R2, R4 and R5 are not all , three H. The invention further relates to a method and kit for the preparation of radiolabeled biomolecules while using the chelating agent.
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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, 2004 and granted September 18, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 15, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 15, 2026.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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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.