72040174
Nov 6, 1957
Oct 7, 1958
STRUCTURAL AND INSULATING MATERIAL OF LIGHT-WEIGHT CONCRETE FORMED INTO BUILDING SLABS, ROOFING, FLOOR AND WALL SLABS, BEAMS, BLOCKS, INSULATING SLABS, AND AS A FIRE RESISTANT CORE MATERIAL FOR DOORS, PARTITION PANELS AND BUILDING PANELS OVER WHICH DECORATIVE FACES ARE APPLIED
Vehicles