AstraZeneca Files 5th Suit Over Generic Seroquel

Law360, New York (July 31, 2008, 12:00 AM EDT) -- AstraZeneca Pharmaceuticals LP has sued Handa Pharmaceuticals LLC for infringement for its bid to produce a generic version of Seroquel XR.

AstraZeneca filed the suit on July 28 in the U.S. District Court for the District of New Jersey alleging patent infringement for two patents covering the active ingredient and its extended-release method after Handa filed an abbreviated new drug application for a generic extended-release form of quetiapine fumarate.

The patents-at-issue are U.S. Patent numbers 4,879,288 and 5,948,437, which expire in 2011 and 2017, respectively....
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