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| Patents for F27B 1 - Shaft or like vertical or substantially vertical furnaces (4,707) |
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| 05/18/1976 | US3957422 Method and device for the peripheral heating of mineral substances in shaft furnaces with fluid fuels and air | | 05/11/1976 | US3955915 Thermal treatment of granular or lumpy material, particularly firing lime, dolomite, magnesite or the like | | 04/06/1976 | US3948647 Method of melting solid iron in a gas cupola | | 03/30/1976 | US3947239 Descending bed of sub-divided solid material | | 03/02/1976 | US3941557 Thermal treatment of granular or lumpy material, particularly firing lime, dolomite, magnesite or the like and furnace therefor | | 02/17/1976 | US3938788 Apparatus for the production of metals by a smelting metallurgical process | | 01/20/1976 | US3933342 Ore processing furnace |
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