In 1870, he formed the Standard Oil Company of Ohio; within a few years it had acquired twenty of the twenty-five refineries in Cleveland, as well as plants in Pittsburgh, Philadelphia, New York, and Baltimore.

• 仅仅几年光景，该公司就兼并了克利夫兰25家公司中的20家以及在匹兹堡、费城、纽约和巴尔的摩的工厂。