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| Number | Title | Issue Date |
| 5480300 | Vertical heat-treating apparatus and heat insulator It is an object of the present invention to provide a vertical heat treatment apparatus having a heat insulator, which has sufficient heat insulation, heat retention and high load pressure bearing properties to cope with increased size dimensions and numb... | 01/02/1996 |
| 4419075 | Blast furnace stove wall An internal partitioning wall for a blast furnace stove in which a layer of insulating material is interposed between two layers of refractory material. Buttressing means such as integral, refractory ledges are provided at periodic vertical intervals from... | 12/06/1983 |
| 4201543 | Hot blast stove breast wall A breast wall construction of a blast furnace hot blast stove includes a free-moving vertical arch composed of reverse wedge interlocking refractory shapes which form a monolithic unit upon differential heat expansion of the breast wall when the blast sto... | 05/06/1980 |
