In Praxair Distrib. v. Mallinckrodt Hosp. Pdts., (Fed. Circ. May 16, 2018), the Federal Circuit affirmed the PTAB’s application of the printed matter doctrine in an IPR, and determined that all challenged claims were obvious. Mallinckrodt’s patent is directed to methods of treating newborns having low blood oxygenation with nitric oxide (NO) gas, “to dilate … Continue Reading