Teva Pharmaceuticals International GmbH v. Eli Lily & Co., No. 20-1747 (Fed. Cir. 2021)
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Teva’s patents, directed to methods of using humanized antagonist antibodies that target calcitonin gene-related peptide (CGRP), a 37-amino acid peptide that is “a neurotransmitter in the central nervous system, and has been shown to be a potent vasodilator. Dilation of blood vessels was associated with and thought to exacerbate the pain symptoms of migraine. Lilly filed petitions for inter partes review (IPR).
In three IPR proceedings, the Board issued a combined final written decision holding that the challenged claims in all three patents are unpatentable as they would have been obvious over various cited references and that a skilled artisan would have been motivated to combine the teachings of the prior art and would have had a reasonable expectation of successfully achieving the claimed invention. The Federal Circuit affirmed, rejecting Teva’s arguments that the Patent Trial and Appeal Board erred as a matter of law in its motivation to combine analysis by deviating from the motivation asserted by Lilly in its IPR petitions, that even under the motivation to combine that the Board did analyze, substantial evidence does not support the Board’s factual findings, and that the Board erred in its analysis of secondary considerations of nonobviousness
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