73243635
Dec 20, 1979
Nov 9, 1982
Refractory Shapes; Lances for Injecting Gases, Solids, and/or Liquids into Molten Metal; Ladles; Ladle Liners; Burner Cones; Blow Pipes; and Oven Plugs; All Being Designed for Use as Parts of Hearths, Furnaces, Kilns and High Temperature Ovens and Vessels
Environmental Control Apparatus