Kyle Bass, the hedge fund manager who has challenged more than two dozen pharmaceutical patents at the U.S. Patent and Trademark Office, will finally see one of those challenges go to trial.

On Wednesday, the Patent Trial and Appeal Board instituted an inter partes review that Bass' Coalition for Affordable Drugs filed against a drug patent owned by Cosmos Technologies.

“Based on the information presented in the petition and preliminary response, we are persuaded there is a reasonable likelihood petitioner would prevail with respect to the claims challenged in the petition,” Administrative Patent Judge Jacqueline Bonilla wrote in the 20-page decision on behalf of the panel, which also included Judges Sheridan Snedden and Susan Mitchell.