Standard Oil (in full, Standard Oil Company and Trust) was an American company and corporate trust built by John D. Rockefeller and associates. Incorporated in Ohio in 1870, it expanded through acquisitions, mergers, and favorable railroad rebates. In 1882, Standard Oil and its affiliated companies were combined into the Standard Oil Trust. By then, it controlled the refining of 90% to 95% of alloil produced in the United States.
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