19 Non-metallic refractory materials, namely, refractory concrete, refractory shapes not of metal; articles and shapes of refractory material used in casting, not of metal, namely, fired refractory materials not of metal, non-metal refractory bricks; ceramic refractory masses for lining metallurgical furnaces; ceramic refractory workpieces, namely, refractory concrete, refractory mortars for use in construction; ceramic refractory workpieces for constructing intermediate walls in metallurgical vessels; ceramic shapes for use in refractory furnaces; fired refractory materials, not of metal; fired refractory materials, not of metal; ceramic and non-metal carbon-bonded refractory plates for slide-gate systems for use in building construction; fired bricks, not of metal; fused cast refractory materials, not of metal for use in industry; granular, non-metallic refractory mixes for lining refractory processing vessels; granular, non-metallic refractory mixes for lining refractory processing vessels; grog, namely, fired refractory material, not of metal; refractory materials, not of metal, for forming and repairing linings in high temperature vessels; refractory aggregates, not of metal, namely, refractory concrete, refractory mortars; refractory blocks and building stones for use as furnace linings, not of metal; refractory bricks, not of metal; ceramic bricks for use in refractory furnaces; refractory blocks and building stones, not of metal; refractory bricks, not of metal, for converter, electric arc furnace (EAF), degasser, continuous casting and ladle applications; refractory castable mixes, not of metal; refractory cement; ceramic refractory masses; ceramic refractory masses for covering metallurgical melts; ceramic refractory masses for lining channels; ceramic refractory masses for lining vessels; refractory compositions and materials, not of metal, namely, refractory construction materials not of metal, refractory blocks not of metal; refractory products, not of metal, for ladles, electric arc furnaces, converters, degassing units, torpedo cars and continuous-casting machines, namely, refractory concrete, refractory mortars; non-metal resin-bonded magnesia-chrome and alumina-magnesia-carbon bricks with standard and special shapes; non-metal magnesia-chrome-fired bricks; non-metal alumina-graphite-silicon carbide (AGS) bricks; fire clay bricks; non-metal alumina bricks; refractory non-metallic compositions for use in masonry and industry, namely, concrete, bricks; refractory concrete; refractory furnace linings, not of metal; refractory linings for cement kilns and blast furnaces, not metal; refractory masses for the manufacture of refractory linings, not of metal; fired refractory materials for use in kiln furniture, not of metal; non-metallic accessories for kilns and fired goods, namely, spacers in the nature of bricks, cement slabs, and ceramic tiles, slabs in the nature of cement slabs and natural stone slabs, triangular battens in the nature of reinforcing materials not of metal for building purposes in triangular shape, covers in the nature of non-metal vent cover for HVAC ducts and non-metal coverings for ceilings, setters in the nature of chipboards and clay flooring, tripods in the nature of portable non-metal free-standing barriers with three legs, supports in the nature of plastic pipe supports as building material and panels in the nature of concrete panels and fiberglass panels; refractory materials having thermally insulating coatings, not of metal; refractory mortar; refractory products in the form of bricks, not of metal; mortar for bonding bricks in a lining; refractory products in the form of cement; refractory products in the form of concrete; castable refractory mixes, not of metal; light-weight castables being refractory mixes, not of metal; refractory products made from ceramic fiber, namely, refractory bricks, refractory shapes, not of metal; refractory products in the form of non-metallic furnace linings; refractory products in the form of non-metallic masses, namely, refractory bricks, refractory shapes, not of metal; refractory products in the form of non-metallic castable mixes; refractory products in the form of mortar; refractory products, namely, non-metallic gunning, ramming and slinging mixes; refractory products, namely, prefabricated structural elements, not of metal, namely, refractory bricks, refractory shapes, not of metal; refractory shapes not of metal; semi-refractory bricks, not of metal; shrouds and hoods of fired refractory material, not of metal; clay for refractory use; shaped refractory articles, not of metal, for use in thermally demanding environments; shaped refractory articles, not of metal, for use with molten substances; shaped and unshaped refractory materials, not of metal; non-metal fired magnesite bricks; non-metal magnesia-chrome bricks; slide gate plates, namely, reinforcements for concrete and wood building construction in the nature of slide gate plates, not of metal; round refractory blocks and building stones, not of metal; end refractory bricks, not of metal; bricks being refractory articles, not of metal; refractory building stones, not of metal; refractory building materials, not of metal; refractory tiles, not of metal; fire burrs, namely, fireclay, not of metal; fireproof cement coatings; fireplace bricks; unfired bricks, not of metal