U.S. federal trademark · Serial No. 74029611 · Reg. No. 1150793
clays and clay materials in the form of masses for covering metallurgical melts, ceramic refractory work pieces, including bricks, light weight refractory bricks, tubes, closing balls and cones, immersion pipes, protecting tubes for metallurgical melts, plugs, plates, tuyeres, well-nozzles, gas purging plugs, nozzles for metallurgical melts, ceramic refractory mortars, ceramic refractory masses, refractory cement and concrete, ceramic refractory filling compounds, ceramic refractory moulding sands and founding sands, ceramic refractory workpieces for the construction of intermediate walls in metallurgical vessels
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