Federal Circuit Reinforces Stringent Standing Rules in PTAB Appeal Block

The recent decision by the Federal Circuit to block an optical filter maker from appealing a failed Patent Trial and Appeal Board (PTAB) challenge carries significant ramifications for patent litigation. The panel ruled that the company lacked standing to appeal the case, as it presented “mere speculation” that it might be sued again, rather than concrete proof of potential harm. This ruling underscores the judiciary’s stringent standards for establishing standing in appeals from PTAB rulings. For more detailed information, you can review the original article on Law360.