Standard Oil Standard Oil Standard Oil Co. Inc. was an American oil producing, transporting, refining, and marketing company. Established in 1870 by John D. Rockefeller and Henry Flagler as a corporation in Ohio, it was the largest oil refinery in the world of its time. Its history as one of the world's first and largest multinational corporations ended in 1911, when the United States Supreme Court, in a landmark case, ruled that Standard Oil was an illegal monopoly. Standard Oil dominated the oil products market initially through horizontal integration in the refining sector, then, in later years vertical integration; the company was
Standard Oil successor company; the name was used to capitalize on the Standard Oil brand in the 1930s. Standard Oil of Connecticut is a fuel oil marketer not related to the Rockefeller companies. Of the 34 "Baby Standards", 11 were given rights to the Standard Oil name, based on the state they were in. Conoco and Atlantic elected to use their respective names instead of the Standard name, and their rights would be claimed by other companies. By the 1980s, most companies were using their individual brand names instead of the Standard name, with Amoco being the last one to have widespread