ClassID:

118924

C21D1/25 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering; Hardening ; Quenching with or without subsequent tempering Hardening, combined with annealing between 300 degrees Celsius and 600 degrees Celsius, i.e. heat refining ("Vergüten")

Recent Application in this class:
#1
20250025927
2025-01-23

CONDUCTIVE POST-FURNACE HEATING OF SHEET FOR HOT FORMING

#2
20250012382
2025-01-09

STEEL PIPE FOR OIL CYLINDER AND MANUFACTURING METHOD THEREFOR

#3
20240410041
2024-12-12

Alloy for Mud Motor Shaft Applications with High Strength, High Impact Toughness and Excellent Fatigue Life

#4
20240410040
2024-12-12

AUSTENITE ALLOY, BLANK AND COMPONENT, AND METHOD

#5
20240399439
2024-12-05

HOT PRESSED MEMBER

#6
20240344164
2024-10-17

ADVANCED HIGH STRENGTH ZINC PLATED STEEL SHEET HAVING EXCELLENT SURFACE QUALITY AND ELECTRICAL RESISTANCE SPOT WELDABILITY AND MANUFACTURING METHOD THEREOF

#7
20240326399
2024-10-03

LOW-DENSITY CLAD STEEL SHEET HAVING EXCELLENT FORMABILITY AND FATIGUE PROPERTY AND MANUFACTURING METHOD THEREFOR

#8
20240309482
2024-09-19

COLD-ROLLED STEEL SHEET AND MANUFACTURING METHOD THEREOF

#9
20240263265
2024-08-08

HIGH STRENGTH STEEL PRODUCTS AND ANNEALING PROCESSES FOR MAKING THE SAME

#10
20240173787
2024-05-30

TOOL AND MANUFACTURING METHOD OF IT

#11
20230357877
2023-11-09

Method for Producing Conventionally Hot-Rolled Strip Products

#12
20230332261
2023-10-19

METHOD FOR MANUFACTURING EQUAL-HARDNESS CR5 BACK UP ROLL

#13
20230271635
2023-08-31

RAILWAY AXLE

#14
20230257846
2023-08-17

Cold rolled, coated and post batch annealed steel sheet

#15
20230243014
2023-08-03

Galvanized steel sheet, member, and method for producing them

#16
20230211396
2023-07-06

Anti-Collapse Oil Casing with High Strength and Manufacturing Method Therefor

#17
20230193437
2023-06-22

STAINLESS STEEL

#18
20230127243
2023-04-27

Steel sheet, member, and method for producing them

#19
20230094959
2023-03-30

Steel with Controlled Yield Ratio and Manufacturing Method therefor

#20
20230077921
2023-03-16

METHOD FOR PRODUCING A STEEL STRIP WITH A MULTIPHASE STRUCTURE, AND RELATED STEEL STRIP

#21
20230024115
2023-01-26

Advanced high strength zinc plated steel sheet having excellent surface quality and electrical resistance spot weldability

#22
20230002844
2023-01-05

PROCESS FOR PRODUCING AN AT LEAST PARTLY QUENCHED AND TEMPERED SHEET STEEL COMPONENT AND AT LEAST PARTLY QUENCHED AND TEMPERED SHEET STEEL COMPONENT

#23
20220235442
2022-07-28

Steel sheet and method for producing the same

#24
20220176434
2022-06-09

Conductive post-furnace heating of sheet for hot forming

#25
20220090250
2022-03-24

Aluminum-based coating for flat steel products for press mold hardening components, and method for producing same

#26
20220090248
2022-03-24

Hot dip galvanized steel sheet and method for producing same

#27
20220042148
2022-02-10

Steel material suitable for use in sour environment

#28
20220002836
2022-01-06

Hot-rolled steel strip and manufacturing method

#29
20220002832
2022-01-06

Production method for high-strength steel sheet

#30
20210260862
2021-08-26

Low-density clad steel sheet having excellent formability and fatigue property

#31
20210222267
2021-07-22

Method for producing a ultra high strength coated or not coated steel sheet and obtained sheet

#32
20210164069
2021-06-03

STEEL PLATE MEMBER AND METHOD OF PRODUCING THE SAME

#33
20210123114
2021-04-29

Method for forming a cold rolled, coated and post batch annealed steel sheet

#34
20210025017
2021-01-28

Case hardened titanium parts and method for making the same

#35
20200391275
2020-12-17

Process of manufacturing of segments for carbon thrust bearing

#36
20200370141
2020-11-26

Cold rolled and annealed steel sheet and method of manufacturing the same

#37
20200291496
2020-09-17

Extremely high conductivity low cost steel

#38
20200283875
2020-09-10

ALUMINUM-IRON-ZIRCONIUM ALLOYS

#39
20200263575
2020-08-20

High performance iron-based alloys for engine valvetrain applications and methods of making and use thereof

#40
20200232076
2020-07-23

Stainless steel

#41
20200040422
2020-02-06

High strength annealed steel products and annealing processes for making the same

#42
20190390291
2019-12-26

ANNEALING PROCESSES FOR MAKING HIGH STRENGTH STEEL PRODUCTS

#43
20190338808
2019-11-07

Bearing component and method for manufacturing the same

#44
20190309407
2019-10-10

Method of fabricating a nitrided low-alloy steel part

#45
20190264300
2019-08-29

Method for producing a ultra high strength coated or not coated steel sheet and obtained sheet

#46
20190264299
2019-08-29

Method for producing an ultra high strength coated or not coated steel sheet and obtained sheet

#47
20190264298
2019-08-29

Martensitic stainless steel sheet

#48
20190226067
2019-07-25

High-strength steel sheet and production method therefor

#49
20190218652
2019-07-18

Metal coated steel sheet, manufacturing method of hot-dip galvanized steel sheet, and manufacturing method of alloyed galvannealed steel sheet

#50
20190211415
2019-07-11

NIOBIUM AND CHROMIUM LOW ALLOY CARBON STEEL FOR HIGH WEAR RESISTANT AUTOMOTIVE CHAIN LINK PLATES

#51
20190203315
2019-07-04

High-strength cold rolled steel sheet and method for producing the same

#52
20190177813
2019-06-13

Seamless steel pipe and method for producing same

#53
20190160521
2019-05-30

Manufacturing method of a cutting member

#54
20190127815
2019-05-02

Precipitation hardening steel and its manufacture

#55
20190127814
2019-05-02

Precipitation hardening stainless steel and its manufacture

#56
20190100821
2019-04-04

High-strength seamless stainless steel pipe and method of manufacturing high-strength seamless stainless steel pipe

#57
20190062864
2019-02-28

High strength annealed steel products

#58
20190055860
2019-02-21

High performance iron-based alloys for engine valvetrain applications and methods of making and use thereof

#59
20190040481
2019-02-07

Tool steel articles from additive manufacturing

#60
20190032165
2019-01-31

High strength spring, method of manufacturing the same, steel for high strength spring, and method of manufacturing the same

#61
20190017141
2019-01-17

Method of heat treating a fastening member

#62
20190009139
2019-01-10

Golf Club Head Alloy and Method of Using the Same to Produce a Golf Club Head

#63
20190003021
2019-01-03

Hot work tool steel

#64
20190003000
2019-01-03

Bolt

#65
20180355449
2018-12-13

High toughness martensitic stainless steel and reciprocating pump manufactured therewith

#66
20180320262
2018-11-08

Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistance

#67
20180320243
2018-11-08

Method of manufacturing stainless pipe for oil wells and stainless steel pipe for oil wells

#68
20180313447
2018-11-01

Piston rings in cast tool steels and process for the manufacture thereof

#69
20180305799
2018-10-25

Prehardened steel material, mold, and mold component

#70
20180259022
2018-09-13

Spring steel wire and spring

#71
20180216652
2018-08-02

High-strength screw including an unhardened thread end

#72
20180216214
2018-08-02

High-strength steel material having excellent fatigue properties

#73
20180209024
2018-07-26

Drill component

#74
20180209023
2018-07-26

Martensitic stainless steel

#75
20180209009
2018-07-26

Stainless steel and stainless steel product for oil well

#76
20180195145
2018-07-12

Method of producing martensitic stainless steel strip

#77
20180179610
2018-06-28

High-strength steel sheet and production method therefor

#78
20180112285
2018-04-26

Martensitic stainless steel

#79
20180023160
2018-01-25

High-strength steel sheet and production method therefor

#80
20180023158
2018-01-25

High-strength heavy-walled stainless steel seamless tube or pipe and method of manufacturing the same

#81
20170369963
2017-12-28

Seamless stainless steel pipe for oil country tubular goods and method of manufacturing the same

#82
20170362679
2017-12-21

High tensile steel wire

#83
20170335419
2017-11-23

Stainless steel strip for flapper valves

#84
20170327924
2017-11-16

High strength steel products and annealing processes for making the same

#85
20170327920
2017-11-16

Cold work tool and method for manufacturing same

#86
20170314107
2017-11-02

Rolled steel bar or rolled wire rod for cold-forged component

#87
20170306452
2017-10-26

Aluminum-iron-zirconium alloys

#88
20170283957
2017-10-05

Steel for carburizing, carburized steel component, and method of producing the same

#89
20170282501
2017-10-05

Steel for carburizing, carburized steel component, and method of producing the same

#90
20170275715
2017-09-28

High-strength seamless steel pipe for oil country tubular goods and method of producing the same

#91
20170204488
2017-07-20

Leaf spring and method of manufacture thereof having sections with different levels of through hardness

#92
20170191142
2017-07-06

Method for producing a component having improved elongation at break properties

#93
20170145536
2017-05-25

Method for producing an ultra high strength coated or not coated steel sheet and obtained sheet

#94
20170137910
2017-05-18

Method for producing an ultra high strength coated or not coated steel sheet and obtained sheet

#95
20170137905
2017-05-18

High-tensile-strength steel plate and process for producing same

#96
20170130292
2017-05-11

Method for producing a high strength steel sheet having improved strength, ductility and formability

#97
20170110704
2017-04-20

Cables and wires having conductive elements formed from improved aluminum-zirconium alloys

#98
20170107591
2017-04-20

High-yield-ratio, high-strength cold-rolled steel sheet and production method therefor

#99
20170088924
2017-03-30

Alloy for mud motor shaft applications with high strength, high impact toughness and excellent fatigue life

#100
20170088911
2017-03-30

Hardfacing process and parts produced thereby

#101
20170066299
2017-03-09

Stabilizer bar and process of producing a stabilizer bar

#102
20170022582
2017-01-26

High-strength cold-rolled steel sheet with excellent material homogeneity and production method therefor

#103
20170022581
2017-01-26

Seamless steel tube for fuel injection

#104
20170009314
2017-01-12

Piston ring and its production method

#105
20160362770
2016-12-15

Steel strip for cutlery

#106
20160348204
2016-12-01

METHOD FOR IMPROVING THE STRUCTURE OF A STEEL COMPONENT AFTER HEATING AND STELL COMPONENT OBTAINED BY THE METHOD

#107
20160348202
2016-12-01

Hot work tool material and method for manufacturing hot work tool

#108
20160340753
2016-11-24

Maraging steel

#109
20160340752
2016-11-24

Maraging steel

#110
20160333523
2016-11-17

Creping blade and method for its manufacturing

#111
20160245132
2016-08-25

Iron-based alloys and methods of making and use thereof

#112
20160237545
2016-08-18

Method of fabricating a nitrided low-alloy steel part

#113
20160230260
2016-08-11

Steel for high-strength bolts which has excellent delayed fracture resistance and bolt formability, and bolt

#114
20160222497
2016-08-04

Steel for spring, and method for producing spring

#115
20160208854
2016-07-21

Rolling device

#116
20160201174
2016-07-14

Steel having superior rolling fatigue life

#117
20160178093
2016-06-23

Cold-rolled narrow strip in the form of flat wire or profiled elements made of a high-strength steel

#118
20160177427
2016-06-23

High-yield-ratio, high-strength cold rolled steel sheet and production method therefor

#119
20160177414
2016-06-23

High-strength cold-rolled steel sheet and method of manufacturing the same

#120
20160145704
2016-05-26

Hot-stamped part and method of manufacturing the same

#121
20160138125
2016-05-19

Abrasion-resistant steel material excellent in fatigue characteristics and method for manufacturing same

#122
20160131188
2016-05-12

Bearing component and rolling bearing

#123
20160068924
2016-03-10

Method for manufacturing superior 13Cr tool coupler

#124
20160010192
2016-01-14

Thick, tough, high tensile strength steel plate and production method therefor

#125
20160010191
2016-01-14

High-hardness low-alloy wear-resistant steel sheet and method of manufacturing the same

#126
20160010189
2016-01-14

Die steel and method for producing same

#127
20150376731
2015-12-31

Steel wire for spring and method for manufacturing same

#128
20150354040
2015-12-10

Ultra high obdurability steel plate having low yield ratio and process of manufacturing same

#129
20150315667
2015-11-05

Method of manufacturing high strength stainless steel tube or pipe

#130
20150259771
2015-09-17

High strength low alloy steel and method of manufacturing

#131
20150176110
2015-06-25

Thick-walled high-strength hot rolled steel sheet with excellent low-temperature toughness and method of producing same

#132
20150147224
2015-05-28

Steel for wheel

#133
20150144231
2015-05-28

High strength cold-rolled steel sheet and manufacturing method therefor

#134
20150114527
2015-04-30

Steel for oil country tubular goods and method of producing the same

#135
20150091225
2015-04-02

Leaf spring and method of manufacture thereof having sections with different levels of through hardness

#136
20150076386
2015-03-19

Iron-based alloys and methods of making and use thereof

#137
20150053315
2015-02-26

Boron-added high strength steel for bolt and high strength bolt having excellent delayed fracture resistance

#138
20150034219
2015-02-05

High-strength cold-rolled steel sheet and method for manufacturing the same

#139
20150027598
2015-01-29

CHROMIUM-NICKEL STEEL, MARTENSITIC WIRE AND METHOD FOR PRODUCTION THEREOF

#140
20150017471
2015-01-15

Hot-rolled steel sheet and manufacturing method thereof

#141
20140352836
2014-12-04

High-strength seamless steel pipe for oil well use having excellent resistance to sulfide stress cracking

#142
20140305553
2014-10-16

High-strength cold-rolled steel sheet having small variations in strength and ductility and manufacturing method for the same

#143
20140305548
2014-10-16

Carbo-nitriding process for martensitic stainless steel and stainless steel article having improved corrosion resistance

#144
20140287898
2014-09-25

Roll surface layer material for hot rolling with excellent fatigue resistance produced by centrifugal casting, and composite roll for hot rolling produced through centrifugal casting

#145
20140209220
2014-07-31

Two-phase stainless steel, method of manufacturing the same, and diaphragm, pressure sensor, and diaphragm valve using two-phase stainless steel

#146
20140182748
2014-07-03

Method for manufacturing high strength galvanized steel sheet with excellent formability

#147
20140137992
2014-05-22

Thick-walled high-strength seamless steel pipe with excellent sour resistance for pipe for pipeline, and process for producing same

#148
20140117626
2014-05-01

Compression ring and its production method

#149
20140096875
2014-04-10

Abrasion resistant steel plate or steel sheet excellent in resistance to stress corrosion cracking and method for manufacturing the same

#150
20140090755
2014-04-03

Abrasion resistant steel plate or steel sheet excellent in resistance to stress corrosion cracking and method for manufacturing the same

#151
20140079585
2014-03-20

High speed tool steel, material for blade edge, cutting tool, and manufacturing method of material for blade edge

#152
20140060706
2014-03-06

Spring steel and method for manufacturing the same

#153
20140057121
2014-02-27

High strength steel having good toughness

#154
20140007981
2014-01-09

Precipitation hardening type martensitic stainless steel, rotor blade of steam turbine and steam turbine

#155
20130327446
2013-12-12

Aircraft engine shaft comprising a maraging steel having a tensile strength of 2300MPa or more

#156
20130285299
2013-10-31

Spring having excellent corrosion fatigue strength

#157
20130228253
2013-09-05

High toughness secondary hardening steel

#158
20130199674
2013-08-08

Ultra high strength steel having good toughness

#159
20130193648
2013-08-01

Method of producing a piston ring having embedded particles

#160
20130146181
2013-06-13

Steel for carburizing, carburized steel component, and method of producing the same

#161
20130146180
2013-06-13

Steel for carburizing, carburized steel component, and method of producing the same

#162
20130095313
2013-04-18

METHOD FOR INHIBITING CORROSION UNDER INSULATION ON THE EXTERIOR OF A STRUCTURE

#163
20130092280
2013-04-18

Electric resistance welded oil country tubular goods and manufacturing method of electric resistance welded oil country tubular goods

#164
20130087256
2013-04-11

Steel wire with high strength for cold forging to improve service life of mold and method of manufacturing the same

#165
20130058773
2013-03-07

Method of manufacturing material for rotary machine component, method of manufacturing rotary machine component, material for rotary machine component, rotary machine component, and centrifugal compressor

#166
20130048158
2013-02-28

Spring steel and method for manufacturing the same

#167
20130040165
2013-02-14

High-strength steel sheet excellent in seam weldability

#168
20130032251
2013-02-07

Method of processing steel and steel article

#169
20130008566
2013-01-10

Spring and method for producing same

#170
20130000798
2013-01-03

STEEL MATERIAL EXCELLENT IN RESISTANCE OF DUCTILE CRACK INITIATION FROM WELDED HEAT AFFECTED ZONE AND BASE MATERIAL AND METHOD FOR MANUFACTURING THE SAME

#171
20120318409
2012-12-20

SOLID STABILIZER, STEEL MATERIAL FOR SOLID STABILIZER, AND MANUFACTURING METHOD OF SOLID STABILIZER

#172
20120318408
2012-12-20

STEEL PART EXCELLENT IN TEMPER SOFTENING RESISTANCE

#173
20120273089
2012-11-01

Seat structural component tailored for strength

#174
20120267010
2012-10-25

Composite steel part and manufacturing method for the same

#175
20120267009
2012-10-25

Composite steel part and manufacturing method for the same

#176
20120261038
2012-10-18

Low alloy steel for geothermal power generation turbine rotor, and low alloy material for geothermal power generation turbine rotor and method for manufacturing the same

#177
20120256361
2012-10-11

Steel for leaf spring with high fatigue strength, and leaf spring parts

#178
20120255653
2012-10-11

Method of processing steel and steel article

#179
20120216642
2012-08-30

Tempered steel

#180
20120211132
2012-08-23

Method of making ultra high strength steel having good toughness

#181
20120211131
2012-08-23

High strength steel having good toughness

#182
20120211122
2012-08-23

Method for producing carbonitrided member

#183
20120210765
2012-08-23

Method for Manufacturing Mechanical Part Excellent in Rolling Fatigue Life

#184
20120180911
2012-07-19

METHOD FOR PRODUCING A HOLE IN PLATE MEMBER

#185
20120177527
2012-07-12

BEARING STEELS

#186
20120160373
2012-06-28

Forging heat resistant steel, manufacturing method thereof, forged parts and manufacturing method thereof

#187
20120152410
2012-06-21

Method And Device for Energy-Efficient Hot Forming

#188
20120144635
2012-06-14

METHODS AND SYSTEMS FOR MANUFACTURING AN AXLE

#189
20120125492
2012-05-24

Ultratough high-strength weldable plate steel and its method of manufacturing thereof

#190
20120093679
2012-04-19

Method for the production of tools made of alloyed steel and tools in particular for the chip-removing machining of metals

#191
20120080124
2012-04-05

Alloy steel

#192
20120023748
2012-02-02

METHOD OF MAKING A SHAPED METAL PART FOR A MOTOR VEHICLE COMPONENT

#193
20120018062
2012-01-26

Method of hot-rolled thin steel sheet with excellent formability and excellent strength and toughness after heat treatment

#194
20110311390
2011-12-22

Steel material composition for producing piston rings and cylinder sleeves

#195
20110310924
2011-12-22

High strength spring steel wire and high strength spring and methods of production of the same

#196
20110305592
2011-12-15

Steel material composition for producing piston rings and cylinder lines

#197
20110290382
2011-12-01

High-strength stabilizer steel for vehicles having excellent corrosion resistance and low-temperature toughness, method of producing the same, and stabilizer

#198
20110259482
2011-10-27

Use of a Steel Alloy for Well Pipes for Perforation of Borehole Casings, and Well Pipe

#199
20110253270
2011-10-20

Gun barrel of firearms

#200
20110252857
2011-10-20

METHOD FOR MAKING AN ANCHOR BOLT SLEEVE

#201
20110240179
2011-10-06

Method for Producing a Component Having Improved Elongation at Break Properties

#202
20110240176
2011-10-06

HIGH-STRENGTH COLD-ROLLED STEEL SHEET HAVING EXCELLENT FORMABILITY, HIGH-STRENGTH GALVANIZED STEEL SHEET, AND METHODS FOR MANUFACTURING THE SAME

#203
20110217567
2011-09-08

METHOD FOR THE MANUFACTURE OF A COMPOUND PRODUCT WITH A SURFACE REGION OF A WEAR RESISTANT COATING, SUCH A PRODUCT AND THE USE OF A STEEL MATERIAL FOR OBTAINING THE COATING

#204
20110198786
2011-08-18

Method and device for the continuous creation of a bainite structure in a carbon steel, particularly in a strip steel

#205
20110198002
2011-08-18

High-strength galvanized steel sheet with excellent formability and method for manufacturing the same

#206
20110163512
2011-07-07

Steering tie rod end made of steel and method of manufacturing the same

#207
20110162765
2011-07-07

Ball for constant velocity joint and method for producing the same

#208
20110146852
2011-06-23

High strength steel sheet and method for manufacturing the same

#209
20110139315
2011-06-16

High strength galvanized steel sheet with excellent formability

#210
20110126944
2011-06-02

THICK-WALLED HIGH-STRENGTH HOT ROLLED STEEL SHEET WITH EXCELLENT LOW-TEMPERATURE TOUGHNESS AND METHOD FOR PRODUCING SAME

#211
20110120599
2011-05-26

Austempering heat treatment during hot isostatic pressing conditions

#212
20110061771
2011-03-17

PROCESS FOR HEAT-TREATING AND COATING A COMPONENT AND COMPONENT PRODUCED BY THE PROCESS

#213
20110048583
2011-03-03

Hardened martensitic steel, method for producing a component from this steel and component obtained in this manner

#214
20110041961
2011-02-24

Hardened martensitic steel, method for producing a component from this steel and component obtained in this manner

#215
20110030854
2011-02-10

HIGH-STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

#216
20110024003
2011-02-03

High strength corrosion resistant steel

#217
20110014083
2011-01-20

STAINLESS STEEL USED FOR OIL COUNTRY TUBULAR GOODS

#218
20110005643
2011-01-13

Cold rolled steel sheet

#219
20110002808
2011-01-06

FIRE-RESISTANT STEEL MATERIAL SUPERIOR IN WELD HEAT AFFECTED ZONE REHEAT EMBRITTLEMENT RESISTANCE AND LOW TEMPERATURE TOUGHNESS AND METHOD OF PRODUCTION OF SAME

#220
20110000587
2011-01-06

Steel

#221
20100319814
2010-12-23

BAINITIC STEELS WITH BORON

#222
20100319642
2010-12-23

Roller follower, valve train, induction hardening apparatus, method of heat treatment of shaft member, method of manufacturing shaft, and shaft

#223
20100296764
2010-11-25

Method of heat treating a steel bearing component

#224
20100252150
2010-10-07

Heat treatment method of pin for endless track

#225
20100212785
2010-08-26

High-strength low-alloy steel excellent in high-pressure hydrogen environment embrittlement resistance characteristics and method for producing the same

#226
20100206440
2010-08-19

Method of production of 780 MPa class high strength steel plate excellent in low temperature toughness

#227
20100193089
2010-08-05

HOT-WORKING TOOL STEEL HAVING EXCELLENT TOUGHNESS AND HIGH-TEMPERATURE STRENGTH AND METHOD FOR PRODUCTION THEREOF

#228
20100192895
2010-08-05

Steel material having a high silicon content for producing piston rings and cylinder sleeves

#229
20100183473
2010-07-22

Hot forging use non-heat-treated steel and hot forged non-heat-treated steel part

#230
20100183472
2010-07-22

High strength steel sheet excellent in bending workability and fatigue strength

#231
20100180442
2010-07-22

Injection valve, method for its production, and apparatus for performing the method

#232
20100143067
2010-06-10

ANCHOR BOLT AND METHOD FOR MAKING SAME

#233
20100139817
2010-06-10

Martensitic stainless steel composition, method for making a mechanical part from said steel and resulting part

#234
20100089504
2010-04-15

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