H. Koppers Co. ; Heinrich Koppers, GmbH ; Koppers Construction Co. ; Koppers Products Co. ; American Hammered Piston Ring Co. ; Bartlett Hayward Co. ; Beta Corp. ; Western Gas Construction Co. ; Wood Preserving Corp.
Oversized. Chemicals and dyestuffs; engineering and construction; gas and coke products; metal products; plastics; tar products; wood preservation. Building and construction products: expandable polystyrene; refrigeration panel systems; lighting fixtures; waterproofing adhesives; pavement sealer; creosote wood protector; pressure treated wood; kofural impregnated wood; tar products. By-product coke and gas oven plants; benzol recovery plants; motor fuel recovery plants; tar distilling plants; ammonia recovery apparatus. Ultra-high-pressure blast furnace. Road building materials; wood preserving oils; tars; industrial pitch; roofing and waterproofing materials; biuminous paints and coatings; tar acids and tar acid oils; cove oven light oil distillates; agricultural chemical products. Piston rings; valves; couplings; waterless gas holders; radiators; coal fired boilers;