Amphiphilic trisulfonated porphyrazines for photodynamic applications in medicine
CA 2525447 C · Owner: Tian, Hongjian · Inventors: Cauchon, Nicole; Van Lier, Johannes E.; Hassessian, Haroutioun Minas
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed herein are novel trisulfonated tribenzo-mononahptho-porphyrazines processes for making them and their application as improved photosensitizing drugs for the treatment of various medical conditions by photodynamic therapy (PDT). These water-soluble amphiphilic porphyrazines are substituted with different alkylyl, aryl, aminoalkyl and aminoaryl groups with or without , carboxyl moeity.
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 May 14, 2004 and granted August 6, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 14, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 14, 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.
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.