C21C 1/02

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Class  C21C : PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL


Subclass 1/02: Refining of pig-iron; Cast iron Dephosphorising or desulfurising

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
11674192 Method of making steel by deeply dephosphorization in hot metal tank and decarburization using semi-steel with nearly zero phosphorus load in converterSep 27, 22Jun 13, 23University of Science and Technology Beijing
11267764 KR desulfurization stirring paddle casting material and preparation method thereforSep 07, 18Mar 08, 22Baoshan Iron & Steel Co., Ltd.
11254992 Method of dechromizing molten iron and method of manufacturing phosphate fertilizer raw materialOct 16, 18Feb 22, 22501 Nippon Steel Corporation
11035014 Molten steel desulfurization method, molten steel secondary refining method, and molten steel manufacturing methodMay 11, 17Jun 15, 21JFE Steel Corporation
10822668 Process for dephosphorization of molten metal during a refining processJan 08, 16Nov 03, 20S. A. Lhoist Recherche et Developpement
10287644 Molten steel desulfurization method, molten steel secondary refining method, and molten steel manufacturing methodAug 08, 12May 14, 19JFE Steel Corporation
10190183 Method for desulfurizingApr 20, 17Jan 29, 19Almamet Gmbh
10077482 Molten iron refining method and device thereofSep 25, 13Sep 18, 18POSCO
9957581 Method for refining hot metal in converterMar 25, 13May 01, 18JFE Steel Corporation
9920390 Method for preliminary treatment of molten ironJan 17, 13Mar 20, 18JFE STEEL CORPORATION
9708676 Method for preparing low-cost clean steelMar 13, 12Jul 18, 17Not available
9683271 Impeller and method of melt-pool processing method using the sameSep 09, 13Jun 20, 17POSCO
9602042 Method of controlling rotational speed of impellerFeb 29, 12Mar 21, 17NISSHIN STEEL CO., LTD.
9580764 Top-blowing lance and method for refining molten iron using the sameOct 16, 12Feb 28, 17JFE STEEL CORPORATION
9493854 Converter steelmaking methodDec 19, 12Nov 15, 16JFE STEEL CORPORATION
9382595 Method for the production and the purification of molten calcium aluminate using contaminated aluminum dross residueFeb 11, 14Jul 05, 169253-8444 QUEBEC INC., 9255-8444 QUEBEC INC. DBA METKEM INNOVATION,
9315875 Method of refining molten ironJul 19, 12Apr 19, 16JFE STEEL CORPORATION
9187792 Agent for treating molten metals, method for the production and use thereofJan 11, 12Nov 17, 15Alamamet GmbH, ALMAMET GMBH,
9127327 Environmentally friendly flux for molten steel desulfurizationMar 30, 12Sep 08, 15NIPPON STEEL & SUMITOMO METAL CORPORATION
9068237 Method for desulfurizing hot metalAug 08, 12Jun 30, 15JFE STEEL CORPORATION

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Recent Publications

Publication #TitleFiling DatePub DatePatent Owner
2024/0368,716 MOLTEN PIG IRON MANUFACTURING METHODSep 27, 22Nov 07, 24501 Nippon Steel Corporation
2024/0229,177 METHOD FOR DEPHOSPHORIZATION OF MOLTEN IRONApr 19, 22Jul 11, 24JFE Steel Corporation
2024/0167,112 METHOD FOR OPERATING CONVERTER AND METHOD FOR PRODUCING MOLTEN STEELNov 04, 21May 23, 24JFE Steel Corporation
2024/0068,060 REFINING METHOD OF MOLTEN IRON AND MANUFACTURING METHOD OF MOLTEN STEEL USING SAMEDec 09, 21Feb 29, 24JFE Steel Corporation
2024/0068,061 CONVERTER STEELMAKING METHODDec 17, 21Feb 29, 24JFE Steel Corporation
2024/0060,149 MOLTEN IRON REFINING METHODDec 17, 21Feb 22, 24JFE Steel Corporation
2024/0052,443 PROCESS FOR TREATING MOLTEN IRONDec 17, 21Feb 15, 24Not available
2024/0011,121 PRODUCTION METHOD FOR NON-ORIENTED SILICON STEEL AND NON-ORIENTED SILICON STEELAug 04, 21Jan 11, 24INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD (CN); ZHANGJIAGANG YANGTZE RIVER COLD ROLLED PLATE CO. LTD; JIANGSU SHAGANG GROUP CO., LTD.;
2022/0259,686 MOLTEN IRON DEPHOSPHORIZATION METHODJul 02, 20Aug 18, 22JFE Steel Corporation
2022/0170,122 DEVICE AND METHOD FOR CONTINUOUS DESULPHURISATION OF LIQUID HOT METALMay 19, 20Jun 02, 22TATA STEEL NEDERLAND TECHNOLOGY B.V.
2021/0071,274 METHOD FOR REMOVING PHOSPHORUS FROM PHOSPHORUS-CONTAINING SUBSTANCEDec 12, 18Mar 11, 21JFE Steel Corporation
2017/0349,959 Process for Dephosphorization of Molten Metal During a Refining ProcessJan 08, 16Dec 07, 17S. A. LHOIST RECHERCHE ET DEVELOPPEMENT

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Patents Issued To Date - By Filing Year

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