| 9951992 | Metallurgical furnace | Dec 22, 14 | Apr 24, 18 | Tecnored Desenvolvimento Tecnologico S.A. |
| 9945001 | Blast furnace operation method and lance | Mar 27, 14 | Apr 17, 18 | JFE Steel Corporation |
| 9938593 | Blast furnace operation method | Mar 27, 14 | Apr 10, 18 | JFE Steel Corporation |
| 9797023 | Shaft furnace and method of operating same | May 20, 14 | Oct 24, 17 | Grede LLC |
| 9799110 | Abnormality detection method and blast furnace operation method | Jun 18, 14 | Oct 24, 17 | JFE STEEL CORPORATION |
| 9534265 | Methods and systems for producing direct reduced iron incorporating a carbon dioxide and steam reformer fed by recovered carbon dioxide | Dec 15, 14 | Jan 03, 17 | MIDREX TECHNOLOGIES, INC. |
| 9422192 | Optimised vertical-shaft kiln for producing sulfoaluminous clinker | Jul 12, 13 | Aug 23, 16 | VICAT |
| 9400138 | Melting reduction assembly and method for operating a melting reduction assembly | Jun 13, 12 | Jul 26, 16 | PRIMETALS TECHNOLOGIES AUSTRIA GMBH |
| 9169525 | System of leaktight connection between a tuyere and a hot blast inlet nozzle for a shaft furnace, and steel-making blast furnace comprising such a system | Nov 06, 12 | Oct 27, 15 | PAUL WURTH S.A. |
| 9028743 | Bustle pipe arrangement | Dec 16, 09 | May 12, 15 | Paul Wurth Refractory & Engineering GmbH, PAUL WURTH S.A., |
| 8980165 | Tuyere stock arrangement of a blast furnace | May 23, 11 | Mar 17, 15 | PAUL WURTH S.A. |
| 8945463 | Tuyere stock arrangement for a blast furnace and method for feeding hot blast into a blast furnace | Mar 22, 10 | Feb 03, 15 | PAUL WURTH S.A. |
| 8889060 | Device for regulating the temperature of a gas in a hot gas main | May 18, 10 | Nov 18, 14 | Paul Wurth Refractory & Engineering GmbH, PAUL WURTH S.A., |
| 8808616 | Bustle pipe arrangement | Dec 16, 09 | Aug 19, 14 | Paul Wurth Refractory & Engineering GmbH, PAUL WURTH S.A., |
| 4844426 | Vertical shaft furnace for melting aluminum | Dec 10, 86 | Jul 04, 89 | SOUTHWIRE COMPANY |
| 4699361 | Shaft furnace arrangement for the direct reduction of iron ores | Jul 31, 85 | Oct 13, 87 | VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH & CO. |
| 4647018 | Apparatus for degassing molten metal | Feb 26, 86 | Mar 03, 87 | FIRST UNION NATIONAL BANK, Swiss Aluminium Ltd., |
| 4582302 | Suspended tuyere stock removal device | Dec 12, 83 | Apr 15, 86 | PAUL WURTH S.A. |
| 4494735 | Apparatus for degassing molten metal | Nov 16, 83 | Jan 22, 85 | Swiss Aluminium Ltd. |
| 4374585 | Apparatus for the direct reduction of iron ores | Aug 11, 80 | Feb 22, 83 | Alexandria Extrusion Company, NEUE HAMBURGER STAHLWERKE GMBH, |