Ceramic fibers for insulation purposes, in particular aluminum oxide fibers, silicium oxide fibers, zircon oxide fibers as well as products manufactured therefrom as far as included in this class, namely, ceramic wool and refractory compositions for insulation purposes, in particular on the basis of fireclay, sillimanite, bauxite, corundum, mullite, zircon mullite, chrome corundum, spinel, magnesite and silicon carbide; ceramic fiber paper for insulation purposes, in particular on the basis of aluminum-silica fibers for building purposes; ceramic fiber yarns and ceramic fiber fabrics made thereof for insulation purposes, in particular ceramic fiber strings, ceramic fiber packaging, ceramic fiber strips, ceramic fiber woven fabrics, for building purposes; ceramic insulating materials; ceramic fibers as thermal and electric insulating materials, in particular insulating cords

Refractory castables not of metal, in particular dense castables, dense gunning castables, low cement castables, ultra-low cement castables, insulating castables, insulating gunning castables, special castables and castable molded parts; refractory construction products as far as included in this class, in particular unshaped fireclay materials and fireclay mortar, fireclay bricks; construction bricks having a high content of aluminum based on alumina, fireclay, bauxite, sillimanite, mullite, corundum; refractory bricks, namely, chrome-corundum bricks, zircon oxide bricks, alumina and magnesia spinel bricks; acid resisting bricks; mortar including ceramic binder; chemically binding mortar; building materials, not of metal, namely, vacuum formed boards, shapes, burner blocks, and rooting paper, made of ceramic wool, aluminum oxide wool, aluminum silicate wool, alkaline earth silicate wool, and mineral wool with embedded heat elements; ceramic shapes for use in refractory furnaces, namely, sliding gates made of ceramics for steel pouring ladles