U.S. federal trademark · Serial No. 71633766 · Reg. No. 0587817
GRAPHITE BLOCKS OR BRICKS WHICH ARE IMPREGNATED OR COATED WITH INORGANIC, OXIDATION-RESISTANT COMPOUNDS, SAID BLOCKS OR BRICKS BEING USEFUL IN THE CONSTRUCTION OF MOLDS OR CASTING BEDS IN THE CASTING OF HOT OR MOLTEN METALS AND REFRACTORY COMPOSITIONS
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