In order to establish that the commercial success factor supports a non-obviousness finding, the patentee must establish that a connection (or nexus) exists between the novel aspects of the patent claim(s) and the alleged commercial success. Id.; WesternGeco LLC v. ION Geophysical Corp., 889 F.3d 1308, 1330 (Fed. Cir. 2018). In other words, the patentee must show that the novel aspects of the claim(s) are driving sales and not aspects of the claim(s) that were known in the prior art. In re Huai-Hung Kao, 639 F.3d 1057, 1069 (Fed. Cir. 2011); WesternGeco, 889 F.3d at 1330. In cases brought pursuant to the Hatch-Waxman Act, while there are exceptions, it is most common that patent challengers’ arguments focus predominantly or entirely on an alleged lack of nexus given the substantial sales typically enjoyed by the brand-name drug products that are the subject of such litigation. Though it bears noting that the mere fact that a company is pursuing a generic version of a brand-name drug, by itself, does not support a “commercial success” finding. Galderma Labs., Inc. v. Tolmar, Inc., 737 F.3d 737, 740 (Fed. Cir. 2013).
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