C21D 1/25

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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 1/25: 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) Hardening, combined with annealing between 300 °C and 600 °C, i.e. heat refining ("Vergüten")

Recent Patents

Patent #TitleFiling DateIssue DatePatent Owner
12209299 Steel sheet and method for producing the sameMar 26, 20Jan 28, 25JFE Steel Corporation
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.
12121950 Conductive post-furnace heating of sheet for hot formingMay 06, 20Oct 22, 24Magna International Inc.
12110570 Cold rolled, coated and post batch annealed steel sheetApr 18, 23Oct 08, 24Arcelormittal Commercial RPS S.A.R.L.
12098439 Steel sheet, member, and method for producing themMar 25, 21Sep 24, 24JFE Steel Corporation
12091723 Galvanized steel sheet, member, and method for producing themJun 30, 21Sep 17, 24JFE Steel Corporation
12006562 Hot dip galvanized steel sheet and method for producing sameFeb 06, 20Jun 11, 24501 Nippon Steel Corporation
12000008 Advanced high strength zinc plated steel sheet having excellent surface quality and electrical resistance spot weldabilityDec 18, 20Jun 04, 24POSCO
11993823 High strength annealed steel products and annealing processes for making the sameAug 19, 19May 28, 24United States Steel Corporation
11891680 Steel material suitable for use in sour environmentFeb 13, 20Feb 06, 24501 Nippon Steel Corporation
11795535 Aluminum-based coating for flat steel products for press mold hardening components, and method for producing sameDec 27, 19Oct 24, 23SALZGITTER FLACHSTAHL GMBH
11781596 Bearing component and method for manufacturing the sameDec 05, 17Oct 10, 23NTN Corporation
11767569 Precipitation hardening stainless steel and its manufactureMay 31, 17Sep 26, 23OVAKO SWEDEN AB
11752752 Low-density clad steel sheet having excellent formability and fatigue propertyJul 08, 19Sep 12, 23POSCO CO., LTD.
11732341 Metal coated steel sheet, manufacturing method of hot-dip galvanized steel sheet, and manufacturing method of alloyed galvannealed steel sheetOct 19, 16Aug 22, 23501 Nippon Steel Corporation
11667999 Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistanceJul 19, 18Jun 06, 23UES INC.; MIDWEST THERMAL-VAC INC.; Aktiebolaget SKF;
11661637 Method for forming a cold rolled, coated and post batch annealed steel sheetOct 29, 20May 30, 23Arcelormittal Commercial RPS S.A.R.L.
11624098 Precipitation hardening steel and its manufactureMay 31, 17Apr 11, 23OVAKO SWEDEN AB
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.
11591678 Stainless steelOct 04, 18Feb 28, 23Uddeholms AB

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Recent Publications

Publication #TitleFiling DatePub DatePatent Owner
2025/0025,927 CONDUCTIVE POST-FURNACE HEATING OF SHEET FOR HOT FORMINGOct 04, 24Jan 23, 25Not available
2025/0012,382 STEEL PIPE FOR OIL CYLINDER AND MANUFACTURING METHOD THEREFORNov 24, 22Jan 09, 25Not available
2024/0410,040 AUSTENITE ALLOY, BLANK AND COMPONENT, AND METHODSep 09, 22Dec 12, 24Siemens Energy Global GmbH & Co. KG
2024/0410,041 Alloy for Mud Motor Shaft Applications with High Strength, High Impact Toughness and Excellent Fatigue LifeAug 22, 24Dec 12, 24Not available
2024/0399,439 HOT PRESSED MEMBERAug 30, 22Dec 05, 24JFE Steel Corporation
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
2024/0326,399 LOW-DENSITY CLAD STEEL SHEET HAVING EXCELLENT FORMABILITY AND FATIGUE PROPERTY AND MANUFACTURING METHOD THEREFORJul 17, 23Oct 03, 24Not available
2024/0263,265 HIGH STRENGTH STEEL PRODUCTS AND ANNEALING PROCESSES FOR MAKING THE SAMEApr 19, 24Aug 08, 24Not available
2024/0173,787 TOOL AND MANUFACTURING METHOD OF ITMar 30, 22May 30, 24Seco Tools AB
2023/0002,844 PROCESS FOR PRODUCING AN AT LEAST PARTLY QUENCHED AND TEMPERED SHEET STEEL COMPONENT AND AT LEAST PARTLY QUENCHED AND TEMPERED SHEET STEEL COMPONENTSep 22, 20Jan 05, 23ThyssenKrupp Steel Europe AG
2020/0263,575 High Performance Iron-Based Alloys For Engine Valvetrain Applications And Methods of Making And Use ThereofMay 06, 20Aug 20, 20L.E. Jones Company
2019/0127,815 A PRECIPITATION HARDENING STEEL AND ITS MANUFACTUREMay 31, 17May 02, 19Not available

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