Stabilized radiopharmaceutical compositions
CA 2019035 C · Owner: Draxis Specialty Pharmaceuticals Inc./Produits Pharmaceutiques Specialses Draxis Inc. · Inventors: Charleson, F. Peter; Flanagan, Richard J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Derivatives of synthetic fragments of, mammalian atrial natriuretic factor (ANF) in which a chelate molecule is attached to the N-terminal of the peptide are described. The chelate component allows the facile labelling of these peptides with metallic isotopes such as Tc-99m, Ga-67, In-111 and others. These radioactive chelates are useful in determining the in vivo behavior and fate of derivatives of ANF.
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
- Filed June 14, 1990 and granted November 30, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 14, 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.