17
Rubber, gutta-percha, gum, foams, resins and goods made therefrom, in particular for lightweight and sandwich construction, not included in other classes, plastic in extruded form for use in manufacture, packing, stopping and insulating materials for lightweight and sandwich construction, included in this class, fiberglass fabrics and glass wool for insulation, insulating fabrics, artificial resins and synthetic resins (semi-finished goods), plastics, partly processed, plastic fibres, not for textile purposes; goods, included in this class, being components for lightweight products and sandwich components, in particular being support cores for boat-building, aeronautics, automobile construction, railway wagons, surfboards, aircraft construction, building construction, and for rotor blades for wind power plants
20
Goods of wood, cork, reed, cane, wicker and substitutes for these materials or of plastics, included in this class, in particular for use in lightweight and sandwich construction; goods, included in this class, being components for lightweight products and sandwich components, in particular being support cores for boat-building, aeronautics, automobile construction, railway wagons, surfboards, aircraft construction, building construction, and for rotor blades for wind power plants
40
Treatment of materials, including PET foams, PUR foams, foams, cork, paper honeycombs and balsa wood, for use in lightweight products and being sandwich components, in particular for boat-building, aeronautics, automobile construction, railway wagons, surfboards, aircraft construction, building construction, and for the manufacture of rotor blades for wind power plants