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Corixa Bexxar patents ruled invalid

Executive Summary

San Diego federal court grants Idec motion for summary judgment Oct. 10, declaring four Bexxar (tositumomab) patents (Nos. 5,595,721; 6,015,542; 6,090,365; 6,287,537) invalid based on inequitable conduct of the inventors in not disclosing highly material prior art before the Patent & Trademark Office. "The manner in which [the work] was brought before the PTO cannot be described as anything short of misleading and inaccurate," the ruling states. Corixa and Bexxar marketing partner GSK originally sought to enjoin Idec from infringing the '721, '542, and '365 patents (1"The Pink Sheet" Sept. 24, 2001, p. 29). Corixa plans to appeal the ruling...

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