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 of Colorado of Indiana, and Standard Oil of Colorado was disbanded. Standard Oil of Colorado Standard Oil of Colorado was chartered in Denver, Colorado in 1922. It was eventually rechartered under the name Standard Oil Company of Colorado in 1927 and began to sell stock in 1930. Standard Oil of Colorado was not related to the well known Standard Oil company and did not own any wells, refineries, or gasoline stations. It was sued in 1931 by Standard Oil of Indiana (which was interested in expanding its marketing influence into the Colorado area) over use of the "Standard Oil" name. By 1934,