Sustained-release liposomal anesthetic compositions
CA 2304096 C · Owner: Pacira Pharmaceuticals, Inc. · Inventors: Kim, Taehee; Kim, Sinil; Murdande, Sharad
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides a method for obtaining local anesthetics encapsulated in liposomes, such as multivesicular liposomes with high encapsulation , efficiency and slow release in vivo. When the encapsulated anesthetic is administered as a single intracutaneous dose the duration of anesthesia and , half-life of the drug at the local injection site is increased as compared to injection of unencapsulated anesthetic. The maximum tolerated dose of the encapsulated anesthetic is also markedly increased in the liposomal formulation over injection of unencapsulated anesthetic. These results show that the liposomal formulation of local anesthetic is useful for sustained local infiltration …
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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 September 18, 1998 and granted September 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 18, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 18, 2020.
- 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.