Dr. Seymour Finkelstein, 90, of Darien, formerly of Johnstown, Penn., died Jan. 1. He was the husband of Judith (Bloom) Lantos Finkelstein, and the widower of Janette (Sapiro) Finkelstein. Born in Johnstown, Penn., he was the son of the late Dr. Louis and Frances Finkelstein. He served as a captain in the United States Army Air Corps until his discharge in 1948. During his military service, he was stationed in the Philippines and in Hawaii. In addition to his wife, he is survived by his children, Dr. Robert Finkelstein, James Finkelstein and Susan Kostin; his stepsons Steven and James Lantos; his grandchildren, Benjamin Barnet, Andrew Kostin and Jessica Finkelstein; his great-grandson Landon Doyle; and many nieces and nephews. He was also predeceased by his sister Rita Shirley Glosser.