72124537
Jul 24, 1961
Jul 3, 1962
Refractories for Furnaces-Namely, Kiln Furniture, Heat Treating Furnace Parts, Metal Melting Furnace Parts, Furnace Hearths, Furnace Linings, Burner Blocks, Tap-Out Blocks, Hearth Supports, and Protective Tubes for Thermocouples
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