HYDRAULIC 'BALL-LIKE' OIL DRILLING DEVICE NOT PATENTABLE, FEDERAL CIRCUIT

摘要

Schoeller-Bleckmann Oilfield Equipment AG has failed to convince the top patent appeals court to revive its recently invalidated patent for a mechanism that uses fluid-filled balls in oil-drilling. See Schoeller-Bleckmann Oilfield Equipment AG v. Churchill Drilling Tools US, Inc., 2016 WL 6609002 (Fed. Cir. 2016).