73174605
Jun 15, 1978
Nov 13, 1979
OIL RESISTANT SYNTHETIC RUBBER FLEXIBLE SHEETING FOR LINERS AND COVERS FOR PITS, PONDS, CISTERNS, RESERVOIRS; FOR WATERPROOFING MEMBRANES; AND FOR PILLOW TANKS AND ESPECIALLY SUITED FOR STORAGE OF HYDROCARBON LIQUIDS
Nonmetallic Building Materials