For 20 years, Judge Frank Hull has served in a courthouse named for Elbert P. Tuttle, for whom Hull once clerked and whom she has called her greatest influence in the law.

But after two decades as a circuit judge on the U.S. Court of Appeals for the Eleventh Circuit in Atlanta, Hull, 68, has decided to slow down. She notified the White House in a July 4 letter that she intends to retire from regular active service and take senior status at the end of December or earlier, if her successor is selected and confirmed.