FMC v. Sharda USA (Fed. Cir., August 1, 2025) 2024-2335

This opinion concerns an appeal before the United States Court of Appeals for the Federal Circuit, concerning a patent infringement lawsuit between FMC Corporation and Sharda USA, LLC. Sharda USA is appealing a preliminary injunction that prevented it from selling its insecticide, arguing the lower court's interpretation of "composition" in FMC's patents was incorrect and thus, its ruling on patent invalidity was flawed. The appellate court vacates and remands the preliminary injunction, finding the district court erred in its claim construction by adding a "stability" requirement to "composition," which was explicitly removed from the asserted patents' specifications. This error subsequently affected the district court's analysis of anticipation and obviousness, requiring a reconsideration of whether Sharda raised substantial questions regarding the patents' validity.

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