Fired refractory products not of metal; refractory articles not of metal; refractory materials not of metal; refractory bricks not of metal for use in furnace applications; refractory blocks not of metal; refractory walls not of metal for use in furnace applications; refractory walls not of metal comprising modular interlocking bricks, mortars, blocks, refractory shapes not of metal or refractory components not of metal

Repair and maintenance services for industrial processes and equipment; maintenance, repair and reconstruction of furnaces, refractory walls, coke oven walls, refractory products and components; ceramic welding for repair purposes, furnace rebricking and rebuilding; information relating to the condition, repair and maintenance of furnaces provided on line from a computer database or the internet