Consider this proof that Intel Corporation’s antitrust problems have died hard.

After nine years of litigation, the company and its lawyers at Bingham McCutchen won a ruling Thursday denying class certification to a group of plaintiffs who bought computers equipped with Intel microprocessors. Thursday’s opinion from U.S. District Judge Leonard Stark in Wilmington, Del., was filed under seal, but the accompanying order indicates that the judge adopted a special master’s recommendation to deny class certification. That recommendation was issued more than four years ago. (The delay was due in part to the fact that Stark inherited the case from a retired judge.)