Sterile filtered nanoparticulate formulations of budesonide and beclomethasone having tyloxapol as a surface stabilizer
CA 2472582 C · Owner: White, Douglas A. · Inventors: Marcera, Donna M.; White, Douglas A.; Ryde, Niels P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to sterile filtered nanoparticulate compositions of beclomethasone and/or budesonide having a surface stabilizer tyloxapol and optionally, one or more secondary surface stabilizers absorbed onto the surfaces thereof. The nanoparticulate compositions have an optimal effective average particle size of less than about 150 nm.
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 December 31, 2002 and granted April 24, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 31, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 31, 2024.
- 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.