1
Chemicals used in industry, science and photography, as well as in agriculture, horticulture and forestry; unprocessed artificial resins, unprocessed plastics; manures; fire extinguishing compositions; tempering and soldering preparations; chemical substances for preserving foodstuffs; tanning substances; adhesives used in industry.
ceramic powders used in manufacturing; aluminum oxides; magnesium oxides; silicon carbide; carbides
17
Rubber, gutta-percha, gum, asbestos, mica and goods made from these materials and not included in other classes; plastics in extruded form for use in manufacture; packing, stopping and insulating materials; flexible pipes, not of metal.
ceramic fiber in bulk form, namely, ceramic enamel fiber insulation for industrial molten metal furnaces; ceramic fiber blankets, shapes, and modules, namely, material for thermal insulation and fire protection, namely, fire-resistant panels made of ceramic fibers; ceramic fiber in bulk form for use as refractory insulation in furnaces, namely, ceramic fibers manufactured from different compositions of silica, lime, magnesia, alumina, and zirconia material for use as a refractory lining in furnaces
19
Building materials (non-metallic); non-metallic rigid pipes for building; asphalt, pitch and bitumen; non-metallic transportable buildings; monuments, not of metal.
refractory products and materials of all kinds, in the nature of fired refractory material, not of metal for refractory applications, namely, refractory brick, not of metal, refractory mortar, not of metal, refractory castable mixes, not of metal, alumina refractory, namely, refractory castable mixes, not of metal, containing alumina particles and powders for refractory applications, zirconia refractory, namely, refractory castable mixes, not of metal, containing zirconia particles and powders for refractory applications, silicon carbide refractory, namely, refractory castable mixes, not of metal, containing silicon carbide particles and powders for refractory applications, magnesia refractory, namely, refractory castable mixes, not of metal, containing magnesia particles and powders for refractory applications, refractory, namely, refractory blocks, not of metal, and refractory concrete, refractory cement, refractory tile, namely, refractory blocks, not of metal, refractory gunning mix, not of metal, namely, refractory castables, not of metal, suitable for spraying, refractory construction materials, not of metal, and ceramic refractory material, not of metal, in preformed shapes and assemblies, namely, ceramic shapes for use in refractory furnaces
37
Building construction; repair; installation services
building construction; repair, namely, repair of industrial furnaces, and related equipment and apparatus for use in the processing of molten metal, molten glass and for use in other high heat processing of materials, including, namely, refractory materials within these furnaces and equipment; installation services, namely, installation of refractory materials in the nature of insulating refractory materials, refractory bricks, refractory blocks, refractory castable mixes, refractory cement, refractory mortars, refractory shapes, refractory furnace linings and refractory shapes within industrial furnace equipment and related apparatus used in the handling of molten metal, molten glass, and for other thermal processes; installation and repair of industrial furnaces; installation and repair of industrial heating equipment