Government lawyers have weighed in on a case in front of the U.S. Court of Appeals for the Federal Circuit that could have repercussions for stem cell researchers and public interest groups challenging patent reexaminations.

In the brief submitted last week at the behest of a Federal Circuit panel, the U.S. Department of Justice and the U.S. Patent and Trademark Office responded to questions raised by the panel about whether the two public interest groups that brought the suit—Consumer Watchdog and the Public Patent Foundation—had standing.