A federal judge on Wednesday ruled against Qualcomm Inc.'s effort to block the implementation of a sweeping antitrust ruling against it as the mobile chip supplier pursues an appeal that could take more than a year to wind through the courts.

The ruling was widely expected, but Qualcomm has argued in court that it could hamper critical negotiations with phone makers over 5G technology. Qualcomm did not immediately return a request for comment.

U.S. District Judge Lucy Koh did not give a specific reason for denying Qualcomm's motion but she did strike from the record several pieces of evidence that Qualcomm had tried to use to make its case, including a slide deck from Qualcomm's trial with Apple Inc. that alleged a coordinated effort inside the iPhone maker to harm Qualcomm financially. Government regulators had objected to including the slide deck, which would have become part of the official record for higher courts to review.