Particle formation methods and their products
CA 2426247 C · Owner: Nektar Therapeutics (A Delaware Corporation) · Inventors: York, Peter; Hanna, Mazen Hermiz
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Preparation of particles of an active substance having a layer ofan additive at the particle surfaces, by dissolving both the active substance and the additive in a vehicle to form a target solution and contacting the target , solution with an anti-solvent fluid using a SEDSTM particle formation process to cause the active substance and additive to coprecipitate. The additive is typically a protective additive, in particular a taste and/or odour masking agent. Also provided is a particulate coformulation made by the method which , has a finite gradient in the relative additive concentration which , concentration increases radially outwards from the active rich core to the additive-rich …
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 1, 2001 and granted March 8, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 1, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 1, 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.