C21D 1/19

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Class  C21D : MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING, OR OTHER TREATMENTS


Subclass 1/19: General methods or devices for heat treatment, e.g. annealing, hardening, quenching, tempering (furnaces in general F27; electric heating H05B) Hardening (C21D 1/02 takes precedence); Quenching with or without subsequent tempering (quenching devices C21D 1/62) by interrupted quenching

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
12221682 Ultrahigh-strength steel having excellent cold workability and SSC resistance, and manufacturing method thereforNov 29, 19Feb 11, 25POSCO CO., LTD.
12163199 Method for manufacturing a 5NI steel plate with a low remanence and an excellent surface quality to be used in a shipJan 07, 21Dec 10, 24JIANGYIN XINGCHENG SPECIAL STEEL WORKS CO., LTD
12157922 Method for producing a ultra high strength coated or not coated steel sheet and obtained sheetApr 07, 21Dec 03, 24Arcelormittal Commercial RPS S.A.R.L.
12091723 Galvanized steel sheet, member, and method for producing themJun 30, 21Sep 17, 24JFE Steel Corporation
12000008 Advanced high strength zinc plated steel sheet having excellent surface quality and electrical resistance spot weldabilityDec 18, 20Jun 04, 24POSCO
11951522 Low density press-hardening steel having enhanced mechanical propertiesMar 20, 23Apr 09, 24GM Global Technology Operations LLC
11920209 Carbide-free bainite and retained austenite steels, producing method and applications of sameMar 08, 19Mar 05, 24Northwestern University
11618931 Method for producing a high strength steel sheet having improved strength, ductility and formabilityJul 03, 15Apr 04, 23Arcelormittal Commercial RPS S.A.R.L.
11555233 Thick steel plate for structural pipes or tubes, method of producing thick steel plate for structural pipes or tubes, and structural pipes and tubesMar 25, 16Jan 17, 23JFE Steel Corporation
11555226 Method for producing a high strength steel sheet having improved strength and formability and obtained sheetJul 03, 15Jan 17, 23Arcelormittal Commercial RPS S.A.R.L.
11491581 Press hardened steel with tailored propertiesNov 02, 18Nov 08, 22Cleveland-Cliffs Steel Properties Inc.
11473164 High-strength cold-rolled steel sheet and manufacturing method thereforMar 19, 19Oct 18, 22501 Nippon Steel Corporation
11359254 Heat treatment method and heat treatment deviceJan 25, 17Jun 14, 22Schwartz GmbH
11279984 High-strength cold rolled steel sheet having high formability and a method of manufacturing thereofDec 19, 17Mar 22, 22Arcelormittal Commercial RPS S.A.R.L.
11261514 Temporary corrosion protection layerSep 22, 17Mar 01, 22ThyssenKrupp Steel Europe AG; THYSSENKRUPP AG;
11131003 Method for producing an ultra high strength coated or not coated steel sheet and obtained sheetMay 15, 19Sep 28, 21Arcelormittal Commercial RPS S.A.R.L.
11124853 Method for producing a ultra high strength coated or not coated steel sheet and obtained sheetMay 15, 19Sep 21, 21Arcelormittal Commercial RPS S.A.R.L.
11118239 Heat treatment method and heat treatment deviceJan 25, 17Sep 14, 21Schwartz GmbH
11066718 Method of manufacturing stainless pipe for oil wells and stainless steel pipe for oil wellsOct 19, 16Jul 20, 21501 Nippon Steel Corporation
11041225 Heat-treated steel sheet member and method for producing the sameApr 07, 16Jun 22, 21501 Nippon Steel Corporation

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Recent Publications

Publication #TitleFiling DatePub DatePatent Owner
2024/0344,164 ADVANCED HIGH STRENGTH ZINC PLATED STEEL SHEET HAVING EXCELLENT SURFACE QUALITY AND ELECTRICAL RESISTANCE SPOT WELDABILITY AND MANUFACTURING METHOD THEREOFApr 25, 24Oct 17, 24POSCO Co., Ltd
2024/0167,135 CARBIDE REFINING METHOD OF HIGH-CARBON HIGH-ALLOY STEELJun 30, 23May 23, 24Not available
2024/0132,988 CARBIDE-FREE BAINITE AND RETAINED AUSTENITE STEELS, PRODUCING METHOD AND APPLICATIONS OF SAMEDec 06, 23Apr 25, 24Not available
2021/0301,361 TOOL FOR A HYDRAULIC HAMMERMar 31, 20Sep 30, 21Caterpillar Inc.
2021/0115,527 METHOD FOR MANUFACTURING A HOT-FORMED ARTICLE, AND OBTAINED ARTICLENov 24, 17Apr 22, 21TATA STEEL IJMUIDEN B.V.
2019/0055,620 CU-CONTAINING LOW-ALLOY STEEL HAVING EXCELLENT BALANCE BETWEEN STRENGTH AND LOW-TEMPERATURE TOUGHNESS AND METHOD FOR PRODUCING SAMEFeb 08, 17Feb 21, 19THE JAPAN STEEL WORKS, LTD.
2017/0321,292 COLD TREATMENT FOR IMPROVING THE LOAD-BEARING CAPACITY OF METALLIC COMPONENTSOct 19, 15Nov 09, 17ZF FRIEDRICHSHAFEN AG, ZF WIND POWER ANTWERPEN N.V.,
2017/0233,847 Method for Producing a Coated Steel Sheet having Improved Strength, Ductility and FormabilityAug 07, 15Aug 17, 17ARCELORMITTAL
2016/0237,520 HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT FORMABILITY AND LOW-TEMPERATURE TOUGHNESS, AND METHOD FOR PRODUCING SAMESep 25, 14Aug 18, 16KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.)

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