71487224
Aug 17, 1945
Feb 26, 1946
HIGH TEMPERATURE RESISTING ARTICLES-NAMELY, BLOCKS, TUBES, AND OTHER SHAPES, AND POWDER USED FOR HEAT INSULATION PURPOSES AND TO EMBED ARTICLES FOR FIRING IN KILNS OR FURNACES, AND CORROSION RESISTANT ARTICLES-NAMELY, BLOCKS, TUBES, AND OTHER SHAPES, MADE OF FIRED VITREOUS MATERIALS AND USED FOR CONSTRUCTING VESSELS OR PIPES OR LINERS FOR VESSELS OR PIPES FOR CONTAINING OR TRANSPORTING CORROSIVE SUBSTANCES-NAMELY,CORROSIVE CHEMICAL SOLIDS CORROSIVE CHEMICAL BATHS, AND CORROSIVE CHEMICAL VAPORS, THE CORROSIVE CHEMICALS BEING ACID, BASIC, OR ACID AND BASIC MIXTURES
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