Injectable formulations of nanoparticulate naproxen
CA 2340221 C · Owner: Alkermes Pharma Ireland Limited · Inventors: De Castro, Lan; Lee, Robert
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described are an injectable formulation of nanoparticulate naproxen that produces minimal or no pain or burning sensation upon administration and , methods of making and using such a formulation. The injectable formulation comprises nanoparticulate naproxen having a povidone polymer adsorbed on the surface thereof in an amount sufficient to maintain an effective average particle size of less than about 600 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 August 12, 1999 and granted October 14, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 12, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 12, 2021.
- 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.