Protein labelling
CA 2010800 C · Owner: Anormed, Inc. · Inventors: Zubieta, Jon A.; Schwartz, David A.; Giandomenico, Christen M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bifunctional aromatic compounds which are capable of linking metal ions to biologically useful molecules. The bifunctional compounds are characterized as having a hydrazine or hydrazide group and a protein reactive group. The hydrazine or hydrazide group may be protected as a lower alkyl hydrazone. Conjugates of the bifunctional compounds with macromolecules are also described and labelled macromolecules comprised of the conjugates and metal ions are provided. Additionally, a method is provided for forming a labelled macromolecule by reacting a conjugate with a metal species. The compounds and method of this invention are particularly useful in the fields of biology and medicine for imaging …
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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, 1990 and granted January 16, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 23, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 23, 2012.
- 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.