| 2024/0361,074 | PARALLEL-FLOW REGENERATIVE SHAFT KILN AND METHOD FOR BURNING CARBONATE ROCK | Apr 25, 22 | Oct 31, 24 | Maerz Ofenbau AG; thyssenkrupp Polysius GmbH; THYSSENKRUPP AG; |
| 2017/0191,757 | OXYGEN BOOSTING AND NATURAL GAS REPLACEMENT OF COKE IN CUPOLAS | Dec 06, 16 | Jul 06, 17 | LINDE AKTIENGESELLSCHAFT |
| 2017/0016,673 | METHOD FOR OPERATING A SHAFT FURNACE | Feb 27, 15 | Jan 19, 17 | THYSSENKRUPP AG, THYSSENKRUPP STEEL EUROPE AG, |
| 2016/0320,125 | METALLURGICAL FURNACE | Dec 22, 14 | Nov 03, 16 | TECHNORED DESENVOLVIMENTO TECHNOLOGICO S.A., Tecnored Desenvolvimento Technologico S.A., |
| 2015/0218,666 | BLAST FURNACE INSTALLATION | Sep 05, 13 | Aug 06, 15 | MITSUBISHI HEAVY INDUSTRIES, LTD. |
| 2015/0210,593 | OPTIMISED VERTICAL-SHAFT KILN FOR PRODUCING SULFOALUMINOUS CLINKER | Jul 12, 13 | Jul 30, 15 | VICAT |
| 2015/0203,929 | METHOD FOR PRODUCING PIG IRON AND BLAST FURNACE FACILITY USING SAME | May 15, 13 | Jul 23, 15 | MITSUBISHI HEAVY INDUSTRIES, LTD. |
| 2015/0197,699 | METHOD FOR PRODUCING CARBONIZED COAL, METHOD FOR WORKING BLAST FURNACE, AND METHOD FOR OPERATING BOILER | Sep 13, 13 | Jul 16, 15 | MITSUBISHI HEAVY INDUSTRIES, LTD. |
| 2015/0184,939 | BLAST FURNACE INSTALLATION | Sep 05, 13 | Jul 02, 15 | MITSUBISHI HEAVY INDUSTRIES, LTD. |
| 2015/0176,095 | SHAFT FURNACE AND METHOD OF OPERATING SAME | May 20, 14 | Jun 25, 15 | Grede LLC |
| 2012/0067,171 | DIRECT SMELTING PROCESS AND APPARATUS | Feb 09, 10 | Mar 22, 12 | TECHNOLOGICAL RESOURCES PTY. LIMITED |
| 2011/0074,073 | METHOD OF PRODUCING CAST IRON | Sep 28, 10 | Mar 31, 11 | Not available |
| 2008/0277,843 | Method for Supersonically Injecting Oxygen into a Furnace | Oct 23, 06 | Nov 13, 08 | L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE |