Bifunctional chelating agents
CA 1281499 C · Owner: Tolman, Glen L. · Inventors: Byrne, Edmund F.; Tolman, Glen L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel homocysteine thiolactone bifunctional chelating agents useful for chelating radionuclides to produce a ratiodiagnostic agent for use in in vivo imaging and a method for producing this chelating agent. The novel compounds have the formula:, wherein R is hydrogen or lower alkyl R1 and R2 are, individually hydrogen or lower alkyl or taken together form oxo; R3 is an amino protecting group where R1 and R2 are individually hydrogen or lower alkyl; R3 is hydrogen when R1 and R2 taken together form oxo; R4 is hydrogen or lower alkyl; R5 is hydrogen or a thiol protecting group; x and y are integers from 0 to 2.
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
- Granted March 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 12, 2008.
- 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.