U.S. federal trademark · Serial No. 79241838
Non-metal unshaped refractory products consisting of magnesia, magnesia-chromium, chromium-magnesia, magnesia-spinel, magnesia-carbon, namely refractory mortars, ramming mixes, gunning mixes and filling mixes; Fired and unfired basic non-metal shaped refractory products in the nature of mortars, concrete, and non-metal bricks, consisting of magnesia, magnesia-chromium, chromium-magnesia, magnesia-spinel, magnesia-carbon
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