Class C21C : PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
Subclass 5/35: Manufacture of carbon steel, e.g. plain mild steel, medium carbon steel, or cast-steel Manufacture of steel in the converter Regulating or controlling the blowing Blowing from above and through the bath
| Patent # | Title | Filing Date | Issue Date | Patent Owner |
|---|---|---|---|---|
| 10781499 | Bottom stirring tuyere and method for a basic oxygen furnace | Jan 17, 18 | Sep 22, 20 | Air Products and Chemicals, Inc. |
| 10400293 | Metal making lance with infrared camera in lance head | Nov 27, 17 | Sep 03, 19 | Berry Metal Company |
| 9957581 | Method for refining hot metal in converter | Mar 25, 13 | May 01, 18 | JFE Steel Corporation |
| 9920390 | Method for preliminary treatment of molten iron | Jan 17, 13 | Mar 20, 18 | JFE STEEL CORPORATION |
| 9708676 | Method for preparing low-cost clean steel | Mar 13, 12 | Jul 18, 17 | Not available |
| 9683272 | Gas purging element and associated gas feed line | Aug 07, 13 | Jun 20, 17 | REFRACTORY INTELLECTUAL PROPERTY GMBH & CO. KG |
| 9580764 | Top-blowing lance and method for refining molten iron using the same | Oct 16, 12 | Feb 28, 17 | JFE STEEL CORPORATION |
| 8771400 | Method for manufacturing molten iron | May 14, 10 | Jul 08, 14 | ISTC CO., LTD. |
| 8012237 | Process for producing molten iron | Sep 18, 08 | Sep 06, 11 | KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.), Kobe Steel, Ltd., |
| 7998243 | Method of producing steel with high manganese and low carbon content | Jun 25, 10 | Aug 16, 11 | SMS SIEMAG AKTIENGESELLSCHAFT |
| 7993428 | Method for manufacturing molten iron | Sep 18, 08 | Aug 09, 11 | KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.), Kobe Steel, Ltd., |
| 7897100 | Method and device for the continuous production of steel using metal charge material | Jan 09, 03 | Mar 01, 11 | SMS SIEMAG AKTIENGESELLSCHAFT |
| 7819940 | Production of stainless steel of AISI 4xx grade ferritic steel in an AOD converter | Nov 11, 05 | Oct 26, 10 | SMS SIEMAG AKTIENGESELLSCHAFT |
| 7611563 | Multifunction injector and relative combustion process for metallurgical treatment in an electric arc furnace | Feb 13, 06 | Nov 03, 09 | TECHINT COMPAGNIA TECNICA INTERNAZIONALE S.P.A. |
| 6309443 | Simple ladle refining method | Apr 25, 00 | Oct 30, 01 | NIPPON STEEL CORPORATION |
| 5743938 | Method of decarburizing refining molten steel containing Cr | Dec 12, 96 | Apr 28, 98 | KAWASAKI STEEL CORPORATION |
| 5540753 | Method for refining chromium-containing molten steel by decarburization | Dec 01, 94 | Jul 30, 96 | NIPPON STEEL & SUMIKIN STAINLESS STEEL CORPORATION |
| Publication # | Title | Filing Date | Pub Date | Patent Owner |
|---|---|---|---|---|
| 2025/0043,370 | Smelting unit for steel production with a tap weight of between 60 t and 350 t | Nov 28, 22 | Feb 06, 25 | SMS group GMBH |
| 2024/0287,635 | METHOD FOR PREPARING TITANIUM-CONTAINING ULTRA-LOW-CARBON STEEL | Jun 28, 22 | Aug 29, 24 | Baoshan Iron & Steel Co., Ltd. |
| 2024/0076,754 | MOLTEN IRON REFINING METHOD | Dec 21, 21 | Mar 07, 24 | JFE Steel Corporation |
| 2024/0076,755 | TOP-BLOWING LANCE FOR CONVERTER, METHOD FOR ADDING AUXILIARY RAW MATERIAL, AND METHOD FOR REFINING OF MOLTEN IRON | Dec 02, 21 | Mar 07, 24 | JFE Steel Corporation |
| 2024/0060,149 | MOLTEN IRON REFINING METHOD | Dec 17, 21 | Feb 22, 24 | JFE Steel Corporation |
| 2022/0325,368 | METHOD OF DYNAMIC CONTROL FOR BOTTOM BLOWING O2-CO2-CaO CONVERTER STEELMAKING PROCESS | Aug 11, 20 | Oct 13, 22 | Not available |
| 2021/0047,702 | METHOD TO CONTROL SLAG FOAMING IN A SMELTING PROCESS | Jan 15, 19 | Feb 18, 21 | TATA STEEL NEDERLAND TECHNOLOGY B.V. |
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