Louis S. Cates (1881 – 1959) was born in Massachusetts and attended MIT. He led the Phelps Dodge Company from 1930 - 1947. During that time the company acquired the Nichols Copper Company, the Calumet and Arizona Mining Company, and the United Verde Copper Company. Under Cates' leadership Phelps-Dodge became an integrated copper industry operation. During his tenure the capital stock of Phelps-Dodge more than quadrupled in value, despite the Great Depression. Cates died in 1959