Natera Rips CareDx Bid for Early Ruling Tossing Patent Claims

Natera Inc. lashed into CareDx Inc.’s latest bid to dismiss patent-infringement claims over its organ-transplant rejection test AlloSure, saying in a letter to a Delaware federal judge that “nothing about CareDx’s position entitles it to early summary judgment” on the patents’ validity.

CareDx’s invalidation theory “hinges on irrelevant extrinsic evidence and argument from other cases and proceedings relating to entirely different patents,” Natera said in its letter to Judge Colm F. Connolly opposing CareDx’s request for a conference to discuss the issue, filed Thursday in the US District Court for the District of Delaware.

“CareDx’s position is that the ...