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CHEMISTRY METALLURGY
C21
Iron metallurgy
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
C21D1/00
General methods or devices for heat treatments
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C21D1/28
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Patents Grants
last 30 patents
Information
Patent Grant
Casting-rolling system for batch and continuous operation
Patent number
12,358,034
Issue date
Jul 15, 2025
SMS GROUP GMBH
Dieter Rosenthal
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Electric resistance welded steel pipe or tube
Patent number
12,234,524
Issue date
Feb 25, 2025
JFE Steel Corporation
Yoshikazu Kawabata
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Medium-carbon boron-containing steel and controlled rolling and con...
Patent number
12,234,537
Issue date
Feb 25, 2025
DAYE SPECIAL STEEL CO., LTD.
Nian Zhang
C21 - METALLURGY OF IRON
Information
Patent Grant
Seamless steel pipe having desirable sulfuric acid dew-point corros...
Patent number
12,227,815
Issue date
Feb 18, 2025
JFE Steel Corporation
Masao Yuga
C21 - METALLURGY OF IRON
Information
Patent Grant
Rail vehicle axle
Patent number
12,000,028
Issue date
Jun 4, 2024
Nippon Steel Corporation
Taizo Makino
C21 - METALLURGY OF IRON
Information
Patent Grant
Method for controlling amount of silicon added to ductile cast iron...
Patent number
11,946,120
Issue date
Apr 2, 2024
TIANRUN INDUSTRY TECHNOLOGY CO., LTD.
Jianchen Cong
C21 - METALLURGY OF IRON
Information
Patent Grant
Ultrahigh-strength maraging stainless steel with multiphase strengt...
Patent number
11,767,574
Issue date
Sep 26, 2023
Harbin Engineering University
Zhongwu Zhang
C21 - METALLURGY OF IRON
Information
Patent Grant
High-strength low-carbon bainitic fire-resistant steel and preparat...
Patent number
11,761,050
Issue date
Sep 19, 2023
Central Iron & Steel Research Institute
Zhongmin Yang
C21 - METALLURGY OF IRON
Information
Patent Grant
Case hardening steel
Patent number
11,702,716
Issue date
Jul 18, 2023
JFE Steel Corporation
Keisuke Ando
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Pressure vessel steel sheet having excellent PWHT resistance, and m...
Patent number
11,692,251
Issue date
Jul 4, 2023
POSCO Co., Ltd
Soon-Taik Hong
C21 - METALLURGY OF IRON
Information
Patent Grant
Steel compositions having improved anti-coking properties
Patent number
11,685,981
Issue date
Jun 27, 2023
VALLOUREC TUBES FRANCE
Valentin Rossi
C21 - METALLURGY OF IRON
Information
Patent Grant
Steel for pressure vessels having excellent resistance to hydrogen...
Patent number
11,578,376
Issue date
Feb 14, 2023
POSCO Co., Ltd
Woo-Yeol Cha
C21 - METALLURGY OF IRON
Information
Patent Grant
Electric resistance welded steel pipe or tube and production method...
Patent number
11,512,361
Issue date
Nov 29, 2022
JFE Steel Corporation
Yoshikazu Kawabata
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Method of producing grain-oriented electrical steel sheet
Patent number
11,459,629
Issue date
Oct 4, 2022
JFE Steel Corporation
Yasuyuki Hayakawa
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Low cost lean production bainitic steel wheel for rail transit, and...
Patent number
11,434,553
Issue date
Sep 6, 2022
MAGANG (GROUP) HOLDING CO., LTD.
Mingru Zhang
C21 - METALLURGY OF IRON
Information
Patent Grant
Shaft part
Patent number
11,345,982
Issue date
May 31, 2022
Nippon Steel Corporation
Tatsuya Iwasaki
C21 - METALLURGY OF IRON
Information
Patent Grant
Steel pipe for fuel injection pipe and method for producing the same
Patent number
11,203,793
Issue date
Dec 21, 2021
USUI CO., LTD.
Tatsuya Masuda
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Grant
Hot-work die steel and a preparation method thereof
Patent number
11,180,820
Issue date
Nov 23, 2021
University of Science and Technology Beijing
Jinfeng Huang
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Steel with high hardness and excellent toughness
Patent number
11,162,162
Issue date
Nov 2, 2021
Osaka University
Yoritoshi Minamino
C21 - METALLURGY OF IRON
Information
Patent Grant
Bearing steel and manufacturing method therefor
Patent number
11,136,639
Issue date
Oct 5, 2021
ILJIN GLOBAL CO., LTD.
Oh Chul Kwon
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
Hot steel forging in horizontal press
Patent number
11,065,673
Issue date
Jul 20, 2021
TECNIFORJA—FORJAGEM E ESTAMPAGEM DE PEÇAS TÉCNICAS, LDA
Artur José Pereira Teixeira Mendes
B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information
Patent Grant
Method for producing components from a duplex steel, and components...
Patent number
11,059,102
Issue date
Jul 13, 2021
KSB SE & Co. KGaA
Alexander Boehm
B22 - CASTING POWDER METALLURGY
Information
Patent Grant
Stainless steel for polymer fuel cell separation plate having impro...
Patent number
10,991,954
Issue date
Apr 27, 2021
Posco
Jong Hee Kim
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Steel sheet for cans and method for manufacturing steel sheet for cans
Patent number
10,837,076
Issue date
Nov 17, 2020
JFE Steel Corporation
Hayato Saito
C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information
Patent Grant
Metal plate for laser processing and method for producing stainless...
Patent number
10,744,600
Issue date
Aug 18, 2020
Nippon Steel Corporation
Kazuyoshi Fujisawa
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Grant
Method for homogenizing steel compositions
Patent number
10,738,367
Issue date
Aug 11, 2020
TerraPower, LLC.
Micah J. Hackett
C21 - METALLURGY OF IRON
Information
Patent Grant
Method for producing bearing ring, double row tapered roller bearin...
Patent number
10,718,377
Issue date
Jul 21, 2020
NTN Corporation
Michio Hori
C21 - METALLURGY OF IRON
Information
Patent Grant
Ferritic stainless steel and heat-resistant member
Patent number
10,689,723
Issue date
Jun 23, 2020
Daido Steel Co., Ltd.
Yoshihiko Koyanagi
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Grant
High-strength cold-rolled steel sheet and method for manufacturing...
Patent number
10,590,504
Issue date
Mar 17, 2020
JFE Steel Corporation
Katsutoshi Takashima
C21 - METALLURGY OF IRON
Information
Patent Grant
Ferritic heat-resistant steel and method for producing the same
Patent number
10,519,524
Issue date
Dec 31, 2019
National Institute for Materials Science
Kazuhiro Kimura
C21 - METALLURGY OF IRON
Patents Applications
last 30 patents
Information
Patent Application
STEEL PLATE FOR ADVANCED NUCLEAR POWER UNIT REACTOR CORE SHELL CYLI...
Publication number
20250154617
Publication date
May 15, 2025
ANGANG STEEL COMPANY LIMITED
Chu WANG
C21 - METALLURGY OF IRON
Information
Patent Application
PLASTIC MOLD STEEL PLATE AND METHOD FOR PRODUCING SAME
Publication number
20240336988
Publication date
Oct 10, 2024
JIANGSU SHAGANG GROUP CO., LTD.
Jinbo QU
C21 - METALLURGY OF IRON
Information
Patent Application
STEEL PLATE FOR EVAPORATOR OF ADVANCED NUCLEAR POWER UNIT AND MANUF...
Publication number
20240327964
Publication date
Oct 3, 2024
ANGANG STEEL COMPANY LIMITED
Yong WANG
C21 - METALLURGY OF IRON
Information
Patent Application
HEAT-RESISTANT FERRITIC STEEL
Publication number
20240318289
Publication date
Sep 26, 2024
NIPPON STEEL CORPORATION
Hiroyuki HIRATA
C21 - METALLURGY OF IRON
Information
Patent Application
HIGH-TOUGHNESS ULTRAHIGH-STRENGTH STEEL AND MANUFACTURING METHOD TH...
Publication number
20240318273
Publication date
Sep 26, 2024
Central Iron & Steel Research Institute
Jing NING
C21 - METALLURGY OF IRON
Information
Patent Application
ULTRA-THICK STEEL SHEET WITH EXCELLENT STRENGTH AND LOW-TEMPERATURE...
Publication number
20240295001
Publication date
Sep 5, 2024
POSCO Co., Ltd
Woogyeom KIM
C21 - METALLURGY OF IRON
Information
Patent Application
NON-ORIENTED SILICON STEEL AND METHOD FOR PRODUCING THE SAME
Publication number
20240279782
Publication date
Aug 22, 2024
INSTITUTE OF RESEARCH OF IRON AND STEEL, JIANGSU PROVINCE/SHA-STEEL, CO. LTD
Chongxiang YUE
C21 - METALLURGY OF IRON
Information
Patent Application
MEDIUM-CARBON BORON-CONTAINING STEEL AND CONTROLLED ROLLING AND CON...
Publication number
20240240294
Publication date
Jul 18, 2024
DAYE SPECIAL STEEL CO., LTD.
Nian ZHANG
C21 - METALLURGY OF IRON
Information
Patent Application
HEAT-RESISTANT STEEL FOR STEEL PIPES AND CASTINGS
Publication number
20240200161
Publication date
Jun 20, 2024
Shanghai Electric Power Generation Equipment Co., Ltd.
Linbo MEI
C21 - METALLURGY OF IRON
Information
Patent Application
ELECTRIC RESISTANCE WELDED STEEL PIPE OR TUBE
Publication number
20230079323
Publication date
Mar 16, 2023
JFE STEEL CORPORATION
Yoshikazu KAWABATA
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
ULTRAHIGH-STRENGTH MARAGING STAINLESS STEEL WITH MULTIPHASE STRENGT...
Publication number
20230072654
Publication date
Mar 9, 2023
Harbin Engineering University
Zhongwu ZHANG
C21 - METALLURGY OF IRON
Information
Patent Application
SEAMLESS STEEL PIPE HAVING DESIRABLE SULFURIC ACID DEW-POINT CORROS...
Publication number
20220411890
Publication date
Dec 29, 2022
JFE STEEL CORPORATION
Masao Yuga
C21 - METALLURGY OF IRON
Information
Patent Application
NORMALIZING HEAT-TREATED STEEL SHEET HAVING GOOD LOW-TEMPERATURE IM...
Publication number
20220403479
Publication date
Dec 22, 2022
POSCO
Woo-Gyeom Kim
C21 - METALLURGY OF IRON
Information
Patent Application
STEEL COMPOSITIONS HAVING IMPROVED ANTI-COKING PROPERTIES
Publication number
20220389552
Publication date
Dec 8, 2022
VALLOUREC TUBES FRANCE
Valentin ROSSI
C21 - METALLURGY OF IRON
Information
Patent Application
PREPARATION METHOD OF GLASSLESS GRAIN-ORIENTED SILICON STEEL AND PR...
Publication number
20220364197
Publication date
Nov 17, 2022
SHOUGANG ZHIXIN QIAN'AN ELECTROMAGNETIC MATERIAL CO., LTD.
Xianhui WANG
C21 - METALLURGY OF IRON
Information
Patent Application
METHOD FOR CONTROLLING AMOUNT OF SILICON ADDED TO DUCTILE CAST IRON...
Publication number
20220325390
Publication date
Oct 13, 2022
TIANRUN INDUSTRY TECHNOLOGY CO., LTD.
Jianchen CONG
C21 - METALLURGY OF IRON
Information
Patent Application
FASTENING MEANS FOR A TURBINE- OR VALVE HOUSING
Publication number
20220162966
Publication date
May 26, 2022
Siemens Aktiengesellschaft
Johanna Marie Haan
C21 - METALLURGY OF IRON
Information
Patent Application
Steel Alloy, Use of Such a Steel Alloy, and Component
Publication number
20220154316
Publication date
May 19, 2022
Meita Industrial Co. Ltd.
Clemens Bergmann
C21 - METALLURGY OF IRON
Information
Patent Application
PRESSURE VESSEL STEEL HAVING EXCELLENT HYDROGEN INDUCED CRACKING RE...
Publication number
20220042131
Publication date
Feb 10, 2022
POSCO
Dae-Woo KIM
C21 - METALLURGY OF IRON
Information
Patent Application
RAILROAD TANK CARS FORMED OF LOW-CARBON, HIGH TOUGHNESS, STEEL PLATES
Publication number
20220025496
Publication date
Jan 27, 2022
ARCELORMITTAL
Tanya ROS YANEZ
B61 - RAILWAYS
Information
Patent Application
STEEL MATERIAL HAVING EXCELLENT HYDROGEN INDUCED CRACKING RESISTANC...
Publication number
20220010403
Publication date
Jan 13, 2022
POSCO
Dae-Woo KIM
C21 - METALLURGY OF IRON
Information
Patent Application
High-Strenth Low-Carbon Bainitic Fire-Resistant Steel And Preparati...
Publication number
20210395849
Publication date
Dec 23, 2021
Central Iron & Steel Research Institute
Zhongmin Yang
C21 - METALLURGY OF IRON
Information
Patent Application
HOT-WORK DIE STEEL AND A PREPARATION METHOD THEREOF
Publication number
20210363603
Publication date
Nov 25, 2021
UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING
Jinfeng HUANG
B22 - CASTING POWDER METALLURGY
Information
Patent Application
SHAFT PART
Publication number
20210285078
Publication date
Sep 16, 2021
NIPPON STEEL & SUMITOMO METAL CORPORATION
Tatsuya IWASAKI
F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information
Patent Application
CASTING-ROLLING SYSTEM FOR BATCH AND CONTINUOUS OPERATION
Publication number
20210121924
Publication date
Apr 29, 2021
SMS Group GmbH
Dieter ROSENTHAL
B22 - CASTING POWDER METALLURGY
Information
Patent Application
ELECTRIC RESISTANCE WELDED STEEL PIPE OR TUBE AND PRODUCTION METHOD...
Publication number
20200332381
Publication date
Oct 22, 2020
JFE STEEL CORPORATION
Yoshikazu KAWABATA
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information
Patent Application
STEEL SHEET FOR SHIELDING MAGNETIC FIELD AND METHOD FOR MANUFACTURI...
Publication number
20200318215
Publication date
Oct 8, 2020
POSCO
Tae-Il SO
C21 - METALLURGY OF IRON
Information
Patent Application
STEEL FOR PRESSURE VESSELS HAVING EXCELLENT RESISTANCE TO HYDROGEN...
Publication number
20200095649
Publication date
Mar 26, 2020
POSCO
Woo-Yeol Cha
C21 - METALLURGY OF IRON
Information
Patent Application
STEEL WITH HIGH HARDNESS AND EXCELLENT TOUGHNESS
Publication number
20200080180
Publication date
Mar 12, 2020
OSAKA UNIVERSITY
Yoritoshi MINAMINO
C21 - METALLURGY OF IRON
Information
Patent Application
HEAVY-WALL STEEL PLATE HAVING 450MPA-GRADE TENSILE STRENGTH AND EXC...
Publication number
20190382865
Publication date
Dec 19, 2019
POSCO
Seong-Ung KOH
C21 - METALLURGY OF IRON