Syngenta Crop Protection AG v. UPL Ltd. — Fed. Cir. (argued September 9, 2026)
UPL and Syngenta dispute UPL's patent on three-fungicide crop treatments. UPL said combining mancozeb and benzovindiflupyr with a third fungicide improved disease control. Syngenta challenged all ten claims in post-grant review, a Patent Trial and Appeal Board proceeding that tests a recently issued patent. The Board found the claims unpatentable, ruling that earlier Godoy and Tobler publications disclosed or made obvious the claimed mixtures. UPL appeals. It says Syngenta's petition ignored a key boundary: in patent drafting, ‘consisting of’ normally limits a combination to the listed ingredients. UPL also says Godoy is ambiguous about a product called Nimbus and Tobler offers too many possible mixtures to reveal these exact ones. Anticipation requires one earlier reference to disclose every claim limitation; a list qualifies only if a skilled reader would immediately envision the claimed combination. Syngenta will defend the ruling and separately asks to revive a proposed sanctions motion. It alleged that field trials described in the patent never occurred; UPL disputed that and withdrew reliance on those trials. The Board then declined to authorize the motion.
Syngenta Crop Protection AG v. UPL Ltd. (No. 25-1018) — U.S. Court of Appeals for the Federal Circuit, argued September 9, 2026.
- 0:00Introduction
- 1:37Advocate — Mark Feldstein
- 18:09Advocate — Charles Carson