Ceramic fibres, in particular aluminium oxide fibres, silicon oxide fibres and zircon oxide fibres and goods made therefrom and included in class 19, including ceramic wool, fireproof compounds, in particular based on refractory clay, sillimanite, bauxite, corundum, mullite, zircon mullite, chrome corundum, spinel, magnesite and silicon carbide; refractory concrete, in particular dense concrete, high-density shotcrete, low cement concrete, ultra-low cement concrete, insulation concrete, insul...