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Pfizer's Canadian Lipitor Patent Declared Invalid

Law360 (January 26, 2007, 12:00 AM EST) -- A Canadian court has shot down Pfizer Inc.’s bid to block Ranbaxy Laboratories Ltd. from marketing a generic version of blockbuster drug Lipitor in Canada until 2010, ruling that a Pfizer patent covering the cholesterol-lowering drug’s active ingredient is invalid.

Thursday, Justice von Finckenstein of the Canadian Federal Court in Toronto denied Pfizer’s request to block the issuance of a Notice of Compliance regarding Pfizer’s Canadian patent—CA 2,021,546—which expires on July 19, 2010.

Justice von Finckenstein held that the ‘546 patent was invalid because it did...
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