Drug delivery systems for photodynamic therapy
CA 2408323 C · Owner: The University Of British Columbia · Inventors: Dolphin, David H.; Chowdhary, Rubinah Kausar
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention is generally related to the field of photodynamic therapy by use of photosensitizers and stabilized formulations of the photosensitizers. These formulations may be used to deliver a photosensitizer as a pharmaceutical agricultural, or industrial agent. The photosensitizer containing formulations and compositions of the invention comprise one or more block copolymers. Furthermore, the invention relates to processes for the production of and , application of, said formulations and compositions as photosensitizer drug delivery systems.
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 8, 2001 and granted June 12, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 8, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 8, 2023.
- 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.