A retired Georgia Tech professor won’t have to pay $584,000 in attorney fees to Lyft Inc. over his unsuccessful patent infringement suit.

U.S. District Judge Jon Tigar ruled that, although Stephen Dickerson’s RideApp Inc. and his attorneys at Kasowitz Benson Torres engaged in some “questionable” litigation conduct, it didn’t rise to the “egregious” level that would trigger fee shifting under Section 285 of the Patent Act.