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| Number | Title | Issue Date |
| 4555266 | Method and apparatus for treating liquid metal in a vessel A method and apparatus for treating molten metal in a bottom pour vessel through a pouring opening controlled by a slidable gate closure member. A dual concentric tuyere having a central conduit and an outer annular conduit is positioned in the pouring op... | 11/26/1985 |
| 4424955 | Apparatus for treating liquid metal in a vessel A method and apparatus for treating molten metal in a bottom pour vessel through a pouring opening controlled by a slidable gate closure member. A dual concentric tuyere having a central conduit and an outer annular conduit is positioned in the pouring op... | 01/10/1984 |
| 4401466 | Process for protection of nozzles and refractory lining of a vessel for refining molten metal A process for protecting oxygen injection nozzles and the surrounding refractory lining of a molten metal refining vessel having such oxygen injection nozzles beneath the bath surface. The injection nozzle comprises at least three concentric pipes, the ce... | 08/30/1983 |
| 4396178 | Open-hearth furnace Oxygen is blown into an open hearth furnace beneath the surface of the molten metal through a jacketed tuyere, each tuyere angled toward the center of the furnace. A high volume of jacketing coolant is injected through two separate annular passageways aro... | 08/02/1983 |
| 4347079 | Method of operating an open-hearth furnace Oxygen is blown into an open hearth furnace beneath the surface of the molten metal through a jacketed tuyere, each tuyere angled toward the center of the furnace. A high volume of jacketing coolant is injected through two separate annular passageways aro... | 08/31/1982 |
| 4306610 | Method of controlling continuous casting rate A method for controlling the casting rate in the continuous casting of liquid metals by monitoring the casting temperature downstream from the continuous casting mold and opening or closing the bottom-pour nozzles on the hot metal vessels when the casting... | 12/22/1981 |
