A three-judge panel dismissed criticism of the settlement by plaintiff John Bradley that a lower US court had erred in considering the settlement for damages before Apple's appeals of its liability in the case are heard.
In July 2013, US District Judge Denise Cote ruled that Apple was liable of conspiring with five book publishers to fix e-book prices, a decision upheld by an appellate court.
Apple has launched an appeal in the case to the US Supreme Court.
If the Supreme Court upholds Apple's liability in the case, Apple will pay plaintiffs the full USD 450 million. If the liability ruling is reversed, Apple will pay just USD 70 million.
"The district court's failure to defer its ruling will lead to confusion and uncertainty and potential future litigation," said the Bradley brief.
But the US appeals court roundly rejected this argument.
"The District Court did not abuse its discretion."
The ruling was lauded by plaintiffs attorneys Hagens Berman, which said consumers could ultimately recover more than twice their losses if the Supreme Court upholds the lower court rulings.
"The decision today affirms the contingent settlement structure we fashioned to maximize the potential amount of recovery and get money back into consumers' hands as fast as possible," said attorney Steve Berman.
