Controlled release depot formulations
CA 2504608 C · Owner: Priebe, David · Inventors: Chen, Guohua; Houston, Paul; Kameda, Teresa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Methods and compositions for systemically or locally administering a beneficialagent to a subject are described and include, for example, depot , gel compositions that can be injected into a desired location and which can provide controlled release of @beneficial agent over a prolonged duration of time. The compositions include a biocompatiNe polymer a biocompatible solvent , having low water miscibility that forms a viscous gel with the polymer and limits water uptake by the implant, and a beneficial agent.
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 November 4, 2003 and granted January 8, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 4, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 4, 2025.
- 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.