In a nonprecedential opinion issued on November 13, 2017, the United States Court of Appeals for the Federal Circuit affirmed a district court finding that Apotex’s aBLAs for biosimilar versions of Neulasta® and Neupogen® did not infringe an Amgen protein folding patent. The Federal Circuit affirmed the non-infringement finding despite statements made in Apotex’s pre-litigation letters sent during the parties’ information exchange (i.e., the “patent dance”), which the district court found were controverted by evidence presented by Apotex at trial.
Amgen makes the biologic drugs Neulasta® (pegfilgrastim) and Neupogen® (filgrastim). Apotex submitted aBLAs (“abbreviated Biologics License Applications”) to the FDA seeking approval of biosimilar versions of both drugs under the BPCIA (“Biologics Price Competition and Innovation Act”) framework. The parties engaged in the BPCIA’s “patent dance” information exchange process, whereby Apotex provided Amgen with copies of Apotex’s aBLAs. Amgen ultimately brought suit under 35 U.S.C. § 271(e)(2)(C), (a) and (g), asserting that Apotex’s proposed manufacturing processes would infringe, among others, Amgen’s U.S. Patent. No. 8,952,138 (the ‘138 patent).
The ‘138 patent covers a method of refolding misfolded proteins. This process purportedly allows for large-scale protein refolding using lower reagent volumes than was previously possible. The district court construed (and the Federal Circuit did not reverse) asserted claim 1 of the ‘138 patent to require “refold mixture” protein concentrations above 1.0 g/L. Continue Reading Federal Circuit Evaluates Import of Factual Statements Made During BPCIA Pre-litigation Patent Dance