72266778
Mar 15, 1967
Oct 8, 1968
THERMAL AND SOUND INSULATING AND BUILDING MATERIALS USED FOR STRUCTURAL PURPOSES, FIREPROOFING AND FIRE PROTECTION, SUCH MATERIAL CONSISTING OF CALCIUM SILICATE WITH OR WITHOUT REENFORCING MATERIALS, AND COMPRISING INSULATING BOARDS, INSULATING BUILDING BLOCKS, PIPE COVERING [ , AND ROOFING TILE ]
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