Modified-release metronidazole compositions and methods for making and using same
CA 2181985 C · Owner: Mancini, Alan Mark · Inventors: Schumann, Steven Charles; Mancini, Alan Mark; Desai, Subhash
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Pharmaceutical compositions having a modified release profile for once daily dosing of metronidazole methods for making the pharmaceutical compositions and methods for treating a microbial infection with once daily dosing of the pharmaceutical compositions of the invention are provided. The compositions given once daily exhibit substantial bioequivalence to immediate release metronidazole given three times per day. The compositions of the invention comprise: (a) a first portion of metronidazole which is about 59 wt.% to about 79 wt.% metronidazole; (b) about 1.5 wt.%. to about 3.0 wt.% of an aqueous insoluble poly(meth)acrylic acid ester copolymer which is aqueous permeable. aqueous …
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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, 1995 and granted December 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 4, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 4, 2017.
- 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
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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.