Federal Circuit reaffirms that the mere addition of elements in an accused process cannot negate patent infringement

The Federal Circuit recently reaffirmed the well-established principle of patent law that the mere addition of elements in an accused product or process cannot negate infringement. In Dow Chemical Co. v. Sumitomo Chemical Co., Ltd., the court reaffirmed this principle while vacating a district court's decision granting summary judgment of noninfringement in favor of Sumitomo.