PURDUE PHARMA L.P. v. EPIC PHARMA, LLC (Fed. Cir. 2016) (P) – Process limitations having no effect on a claimed composition will not be given patentable weight

Process limitations in a claimed composition having no effect on the structure of the claimed composition will not be given patentable weight. Here, for example, a claim limitation specifying that a particular impurity in the pharmaceutical composition being claimed...