A recent Federal Circuit decision affirmed in a part a Patent Trial and Appeal Board (PTAB) decision invalidating method of treatment claims including a “providing information” limitation by applying the printed matter doctrine. This article, first published by Law360 on May 18, 2018, discusses the decision in Praxair Distribution Inc. v. Mallinckrodt Hospital Products IP Ltd., 2016-2616, 2016-2656, a case which has implications for both litigators and prosecutors.