Carl J. Batter Jr., 90, retired antitrust lawyer for the Federal Trade Commission, died Jan. 7 at Montgomery General Hospital in Olney. He had a heart attack, said his daughter, Anne Batter.

Mr. Batter joined the FTC in the late 1950s as a lawyer in the bureau of competition and oversaw antitrust cases, specifically those involving the food industry. He retired in 1986.

Carl John Batter Jr., was born in Brooklyn and grew up in Chicago before his family moved to Silver Spring when he was a teenager. He was a 1939 graduate of Washington’s Roosevelt High School. He was a 1943 graduate of Dartmouth College. He studied at Georgetown University law school before he received a law degree from what was then the University of Paris.

During World War II, he served as an Army ordnance disposal expert, disarming bombs and munitions across France.

After his military service, Mr. Batter returned to France and worked as a lawyer. He was a member of the American Legion in Paris and was eventually named the organization’s commander.

Survivors include his wife of 56 years, Gilberte Halbardier Batter, of Rockville; two children, Alain Batter of Silver Spring and Anne Batter of Rockville; two sisters, Marilyn Benedict of Monrovia and Marjorie Neumann of Rockville; and a granddaughter.

— T. Rees Shapiro