Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. UGI Corporation (NYSE: UGI) is a public utility holding company with a variety of assets based in King of Prussia, Pennsylvania. UGI was incorporated in 1882 as United Gas Improvement Co. It encouraged the formation of United Electric Company of New Jersey in 1899. Among the subsidiaries of Public Service Corporation, United Electric Company served as a holding company. In 1903, United Gas Improvement owned the majority of the stock of the Equitable Illuminating Gas Light Company. The latter utility operated Philadelphia gas works at the time. In October 1964 Industrial Gases, Inc., of Pittsburgh filed an antitrust suit in federal district court charging United Gas Improvement with attempting to eliminate competition in sales of bottled propane gas in Pittsburgh. The Philadelphia Gas Works division of UGI challenged a ruling of the Federal Power Commission. The FPC lowered the maximum price that natural gas producers could charge to sixteen cents per 1,000 cubic feet of gas. This mandate was upheld by the United States Supreme Court in May 1968.