by Dennis Crouch The new DuPont v. Synvina decision is important for its specific application obviousness of claim ranges.  It also creates some amount of tension with prior cases — particularly Dynamic Drinkware and Magnum Oil – regarding burden shifting within Inter Partes Review proceedings. E.I. DuPont de Nemours v. Synvina C.V. (Fed. Cir. 2018) In … Continue reading Burden Shifting at the PTAB and the Obviousness of Ranges