A teacher trying to recover “fair share” fees he paid to a union before they were declared unconstitutional does not have a claim for conversion, a federal judge held Thursday.In a written opinion, U.S. District Judge Harry D. Leinenweber granted summary judgment in favor of the Chicago Teachers Union and other defendants named in a proposed class-action lawsuit filed by Joseph Ocol.Leinenweber acknowledged the U.S. Supreme Court in 2018 ruled that forcing public employees to pay fees to a union to which they …