The asserted claims of a DuPont patent disclosing a process for preparing flexographic printing plates were invalid as obvious over prior art and therefore could not support infringement contentions against DuPont’s competitor, MacDermid Printing Solutions, the U.S. Court of Appeals for the Federal Circuit has held. In addition, MacDermid’s Digital CST printing plates did not infringe another DuPont patent (E.I. du Pont de Nemours & Co. v. MacDermid Printing Solutions, L.L.C., August 19, 2016, Lourie, A.).

A full summary of this case has been published on Kluwer IP Law.