U.S. federal trademark · Serial No. 71575306 · Reg. No. 0580654
LIGHTWEIGHT CONCRETE AGGREGATE, LIGHTWEIGHT STRUCTURAL CONCRETE AGGREGATE, LIGHTWEIGHT AGGREGATE CONCRETE BUILDING BLOCKS, LOOSE GRANULAR INSULATION, AND AGGREGATE FOR REFRACTORY CONCRETE, SAID AGGREGATE BEING ESSENTIALLY A HEAT TREATED, EXPANDED, LIGHTWEIGHT, GRANULAR SHALE OR SLATE MATERIAL
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