Electrical insulating materials; insulating materials in the nature of substrates, namely, insulating fabrics, insulating fleeces, foils of metal for insulating, and insulating paper impregnated with hardenable synthetic resins; insulating materials in the nature of substrates, namely, insulating fabrics, insulating fleeces, foils of metal for insulating, and insulating paper coated with hardenable synthetic resins; Plastics in extruded form for use in manufacture; Insulating materials, name...