Macrocyclic thioether ligands and their use as intermediates for binding ions to substrates
CA 2105872 A1 · Owner: Richardson, Adrian P. · Inventors: Richardson, Adrian P.; Smith, Raymond J.; Blower, Philip J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
2105872 9216520 PCTABS00016, 1,4,7-Trithiacyclononane (9S3) and related compounds of formula (I), where one T is S or Se or Te, another T is S or Se or Te and the third T is S, Se, Te, >PX or >AsX, X being a univalent atom or group, and where A1 is -C2H4- or (a) or -C3H6-, A2, is -C2H4- or (a), and A3 is -C2H3R- or (b) or except , when A1 is -C3H6-, -C3H5Rwhere R is alkyl or, substituted alkyl or if the third T contains P or As, R may also be H may be substituted with a linker group which can bind to a substrate such as a protein and which itself retains co-ordinating functionality to chelate a radionuclide for diagnosis or therapy.
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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 March 19, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 19, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 19, 2014.
- 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.