In the 1930s, Standard Oil of Indiana absorbed the American Oil Company, founded in Baltimore in 1910, and incorporated in 1922, by Louis Blaustein and his son Jacob. The combined corporation operated or licensed gas stations under both the "Standard" name and the "American" or "Amoco" name (the latter from "American oil company") and its logo using these names became a red, white and blue oval with a torch in the center. By the mid-twentieth century it was ranked the largest oil company in the United States. In 1985, it changed its corporate name to Amoco. Amoco merged with British Petroleum in December 1998 to form BP Amoco, renamed BP in 2001.