Jul 17, 2008. /Lesprom.com/. Koppers Holdings Inc. intends to release its 2Q 2008 financial results before the opening of the markets on Thursday, August 7, 2008, and to discuss its results on a conference call later that day at 11:00 a.m. EDT. Koppers is a global integrated producer of carbon compounds and treated wood products. Including its joint ventures, Koppers operates facilities in the United States, United Kingdom, Denmark, Australia and China.