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
Heltne Oil Company after the war." It has two-toned decorative brickwork, which, "together with ornamental pilasters blend nicely with the more modern and functional aspects of the design. Large windows to display company products and accessories together with more spacious enclosed service bays reflect the changes taking place in the service station industry during the late 1930's." It was deemed "significant for its association with automobile travel along US 2 from the late 1930s through the early post-war era, as well as for its architecture. Heltne Oil Company The Heltne Oil Company is a site on the National Register of Historic Places located