Sustained release pharmaceutical composition
CA 2007181 C · Owner: Mayne Pharma International Pty Ltd · Inventors: Fisher, Mark Christopher; Morella, Angelo Mario
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sustained release pharmaceutical pellet composition comprises a core element of an active ingredient of high solubility and a coating for the core element. The coating is partially soluble at a highly acidic pH to provide a slow rate of release of the active ingredient. The active ingredient may be a variety of highly soluble medicines. The coating includes at least one insoluble matrix polymer selected from the group consisting of acrylic ester polymers methacrylic ester polymers and mixtures thereof; at least one enteric polymer selected from the group consisting of cellulose acetate phthalate hydroxypropyl, methyl-cellulose phthalate polyvinyl acetate phthalate, methacylic acid …
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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 January 4, 1990 and granted November 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 2012.
- 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.