Ceramic cores used as components for aircraft and land vehicle engines

Non-metallic building materials, namely, building wall framing, curtain walls, storefronts, namely, non-metallic prefabricated walls for installation in the front of a commercial establishment; non-metallic wall panels, doors, windows, skylights for use in commercial and industrial buildings; non-metallic commercial and industrial building entrances, namely, door frames and door panels; non-metallic mall fronts, namely, sliding doors and runners therefor; non-metal forms for use in metal casting, namely, ceramic cores and casting forms comprising wax and plastic patterns for metal casting