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Amgen subsidiary Immunex has appealed against a Patent Trial and Appeal Board (PTAB) decision which invalidated a patent claiming antibodies that target human interleukin-4 receptors (IL-4R).
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Amgen, Immunex, Sanofi-Aventis, Sanofi, Regeneron, PTAB, US Court of Appeals for the Federal Circuit, biologic, Dupixent, patent invalidation