Praxair Distribution Inc. v. Mallinckrodt Hospital Products IP, Ltd.

Mallinckrodt’s 112 patent is directed to methods of distributing nitric oxide gas cylinders for pharmaceutical applications. Inhaled nitric oxide is approved by the FDA for treating neonates with hypoxic respiratory failure, a condition where oxygen levels in the blood are too low. Nitric oxide functions to dilate blood vessels in the lungs and can thereby improve blood oxygenation. Mallinckrodt exclusively supplies inhaled nitric oxide in the United States for pharmaceutical use under the brand name INOmax®. On inter partes review, the Patent and Trademark Office Patent Trial and Appeal Board found claim 9 not unpatentable as obvious under 35 U.S.C. 103 but found claims1-8 and 10-11 unpatentable as obvious. The Federal Circuit reversed as to claim 9 but otherwise affirmed. The Board did not err in applying the printed matter doctrine to claims 1–8 and 10, but its findings regarding the differences between the prior art and claim 9 and its findings on secondary considerations depended on an incorrect interpretation of that claim, and are not supported by substantial evidence. The Board’s uncontested findings regarding prior art render claim 9 obvious under the proper reading of the claim. View "Praxair Distribution Inc. v. Mallinckrodt Hospital Products IP, Ltd." on Justia Law