PUREMET

LIQUID FILTERS AND GAS DIFFUSERS MADE OF POROUS CERAMIC MATERIALS; NAMELY, ALUMINO SILICATES, ALUMINA, MAGNESIA, ZIRCON, ZIRCONIA, SILICON CARBIDE, SILICON NITRIDE, WOLLASTONITE, MULLITE, CARBON AND MIXTURES OF THESE FOR USE IN THE FILTRATION OF LIQUIDS AND FOR THE DIFFUSION OF GASES; CERAMIC FILTERS FOR USE IN METAL PURIFICATION AND CASTING; CERAMIC CRUCIBLES, POUR CUPS, FUNNELS, RUNNER TUBES, LAUNDERS AND PARTS THEREFOR