Ben Peter Freeman, a writer for the “Superman” radio and TV serials, died Dec. 11 of heart failure in Fort Lauderdale, Fla. He was 91.A graduate of the U. of Chicago, he moved to New York City in the early ’30s, where he began his professional career by working as a reporter for the New York Times. He later left that newspaper to work as an independent creative writer. Several of his baseball stories were published in the Saturday Evening Post. In the mid-’40s he signed on to write for the “Superman” radio show, and in 1952 came to Hollywood with Robert Maxwell Prods. to create the “Superman” TV show at Warner Bros. Studios. In 1953 he left Hollywood and joined his brother’s construction company in Chicago, where he worked until his retirement in 1970. He is survived by his wife, June, a sister, a daughter and a granddaughter. A memorial service will be held in early summer.