ClassID:

118921

C21D1/19 - 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 by interrupted quenching

Sub-classes:
Recent Application in this class:
#1
20250197960
2025-06-19

HIGH STRENGTH STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

#2
20250122590
2025-04-17

METHOD FOR PRODUCING A COATED STEEL SHEET HAVING IMPROVED STRENGHT, DUCTILITY AND FORMABILITY

#3
20240344164
2024-10-17

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

#4
20240344160
2024-10-17

Method for manufacturing a 5NI steel plate with a low remanence and an excellent surface quality to be used in a ship

#5
20240309482
2024-09-19

COLD-ROLLED STEEL SHEET AND MANUFACTURING METHOD THEREOF

#6
20240167135
2024-05-23

CARBIDE REFINING METHOD OF HIGH-CARBON HIGH-ALLOY STEEL

#7
20240132988
2024-04-25

CARBIDE-FREE BAINITE AND RETAINED AUSTENITE STEELS, PRODUCING METHOD AND APPLICATIONS OF SAME

#8
20230417516
2023-12-28

LIVE-FIRE TARGET

#9
20230243014
2023-08-03

Galvanized steel sheet, member, and method for producing them

#10
20230226585
2023-07-20

Low density press-hardening steel having enhanced mechanical properties

#11
20230077921
2023-03-16

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

#12
20230024115
2023-01-26

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

#13
20230001466
2023-01-05

HOT-STAMPING FORMED BODY

#14
20220298598
2022-09-22

METHOD FOR PRODUCING A HIGH STRENGTH STEEL SHEET HAVING IMPROVED STRENGTH AND FORMABILITY AND OBTAINED SHEET

#15
20220213573
2022-07-07

A COLD ROLLED MARTENSITIC STEEL AND A METHOD OF MARTENSITIC STEEL THEREOF

#16
20220064745
2022-03-03

High-strength structural steel having excellent cold bendability, and manufacturing method therefor

#17
20220002851
2022-01-06

Ultrahigh-strength steel having excellent cold workability and SSC resistance, and manufacturing method therefor

#18
20210301361
2021-09-30

TOOL FOR A HYDRAULIC HAMMER

#19
20210276065
2021-09-09

Low density press-hardening steel having enhanced mechanical properties

#20
20210222267
2021-07-22

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

#21
20210189517
2021-06-24

Sheet Metal Part Formed from a Steel Having a High Tensile Strength and Method for Manufacturing Said Sheet Metal Part

#22
20210115527
2021-04-22

METHOD FOR MANUFACTURING A HOT-FORMED ARTICLE, AND OBTAINED ARTICLE

#23
20210095357
2021-04-01

METHOD FOR PRODUCING A HIGH STRENGTH COATED STEEL SHEET HAVING IMPROVED STRENGTH AND DUCTILITY AND OBTAINED SHEET

#24
20210062288
2021-03-04

High-strength cold-rolled steel sheet and manufacturing method therefor

#25
20210047705
2021-02-18

Carbide-free bainite and retained austenite steels, producing method and applications of same

#26
20200270716
2020-08-27

HIGH STRENGTH STEELS, PROCESSES FOR MAKING SAME, AND MATERIALS RESULTING THEREFROM

#27
20190338402
2019-11-07

METHOD FOR MANUFACTURING RAILWAY VEHICLE WHEEL

#28
20190338385
2019-11-07

High-strength cold rolled steel sheet having high formability and a method of manufacturing thereof

#29
20190264300
2019-08-29

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

#30
20190264299
2019-08-29

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

#31
20190226060
2019-07-25

Very high strength martensitic steel or part and method of fabrication

#32
20190185981
2019-06-20

Temporary corrosion protection layer

#33
20190126400
2019-05-02

Press hardened steel with tailored properties

#34
20190055620
2019-02-21

CU-CONTAINING LOW-ALLOY STEEL HAVING EXCELLENT BALANCE BETWEEN STRENGTH AND LOW-TEMPERATURE TOUGHNESS AND METHOD FOR PRODUCING SAME

#35
20190032163
2019-01-31

Heat treatment method and heat treatment device

#36
20190032162
2019-01-31

Method and device for the heat treatment of a metal component

#37
20190024203
2019-01-24

METHOD FOR HEAT TREATMENT OF A METAL COMPONENT

#38
20190024199
2019-01-24

Heat treatment method and heat treatment device

#39
20180363082
2018-12-20

High strength hot dip galvanised steel strip

#40
20180320257
2018-11-08

Thick steel plate for structural pipes or tubes, method of producing thick steel plate for structural pipes or tubes, and structural pipes and tubes

#41
20180320243
2018-11-08

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

#42
20180305783
2018-10-25

HIGH STRENGTH STEEL SHEET AND MANUFACTURING METHOD THEREFOR

#43
20180223385
2018-08-09

Increasing steel impact toughness

#44
20180171429
2018-06-21

Heat-treated steel sheet member and method for producing the same

#45
20180080097
2018-03-22

High frequency heat treatment method of ultra-high strength parts

#46
20180010220
2018-01-11

Process for manufacturing steel sheet

#47
20170321292
2017-11-09

COLD TREATMENT FOR IMPROVING THE LOAD-BEARING CAPACITY OF METALLIC COMPONENTS

#48
20170233847
2017-08-17

Method for Producing a Coated Steel Sheet having Improved Strength, Ductility and Formability

#49
20170137910
2017-05-18

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

#50
20170137907
2017-05-18

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

#51
20170130292
2017-05-11

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

#52
20170130290
2017-05-11

Method for producing a high strength coated steel sheet having improved strength and ductility and obtained sheet

#53
20170122247
2017-05-04

Method of forming a cylinder liner

#54
20160237520
2016-08-18

HIGH-STRENGTH STEEL SHEET HAVING EXCELLENT FORMABILITY AND LOW-TEMPERATURE TOUGHNESS, AND METHOD FOR PRODUCING SAME

#55
20160237517
2016-08-18

Method for heat treatment of stainless member, and method for producing forged stainless product

#56
20160138125
2016-05-19

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

#57
20160032430
2016-02-04

Development of nanostructure austempered ductile iron with dual phase microstructure

#58
20150354040
2015-12-10

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

#59
20150114199
2015-04-30

Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels

#60
20140322559
2014-10-30

High-strength flat steel product and method for producing same

#61
20140318672
2014-10-30

High strength hot rolled steel sheet for line pipe use excellent in low temperature toughness and ductile fracture arrest performance and method of production of same

#62
20140242414
2014-08-28

High-strength steel sheet and high-strength galvanized steel sheet excellent in shape fixability, and manufacturing method thereof

#63
20140170440
2014-06-19

High strength steel sheet and high strength galvanized steel sheet excellent in shapeability and methods of production of same

#64
20140076470
2014-03-20

Method for the production of very high strength martensitic steel and sheet or part thus obtained

#65
20140007994
2014-01-09

Quenching method for steel pipe

#66
20130301969
2013-11-14

Method for producing a bearing ring

#67
20130048161
2013-02-28

High strength press-formed member and method for manufacturing the same

#68
20130037182
2013-02-14

MECHANICAL PART MADE OF STEEL HAVING HIGH PROPERTIES AND PROCESS FOR MANUFACTURING SAME

#69
20130014863
2013-01-17

METHOD OF MAGNETICALLY PROCESSING AN IRON-CARBON ALLOY

#70
20120211126
2012-08-23

METHOD OF INDUCTION HEATING AND QUENCHING

#71
20110168304
2011-07-14

Method for manufacturing high strength steel plate

#72
20110146852
2011-06-23

High strength steel sheet and method for manufacturing the same

#73
20110079328
2011-04-07

HIGH STRENGTH HOT ROLLED STEEL SHEET FOR LINE PIPE USE EXCELLENT IN LOW TEMPERATURE TOUGHNESS AND DUCTILE FRACTURE ARREST PERFORMANCE AND METHOD OF PRODUCTION OF SAME

#74
20110048585
2011-03-03

Heat treated galvannealed steel material and a method for its manufacture

#75
20100263771
2010-10-21

Steel wire rod for bearing steel, manufacturing method of steel wire rod for bearing steel, heat treatment method of steel bearing, steel bearing and soaking method of bearing steel

#76
20100193091
2010-08-05

Heat treatment method

#77
20100163140
2010-07-01

Microtreatment of Iron-Based Alloy, Apparatus and Method Therefor, and Microstructure Resulting Therefrom

#78
20090229417
2009-09-17

Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels

#79
20090189436
2009-07-30

Bearing device for wheel

#80
20090107588
2009-04-30

Process for manufacturing steel sheet having very high strength, ductility and toughness characteristics, and sheet thus produced

#81
20090106980
2009-04-30

Process for producing bearing device for wheel

#82
20080264530
2008-10-30

Hot forged product with excellent fatigue strength, method for making the same, and machine structural part made from the same

#83
20080253921
2008-10-16

Abrasion-resistant steel plate

#84
20080253920
2008-10-16

Method for making an abrasion-resistant steel plate and plate obtained

#85
20080251159
2008-10-16

Methods for producing raw material alloy for rare earth magnet, powder and sintered magnet

#86
20080247903
2008-10-09

Method for Making an Abrasion-Resistant Steel Plate and Plate Obtained

#87
20080236709
2008-10-02

COLD-WORKED STEELS WITH PACKET-LATH MARTENSITE/AUSTENITE MICROSTRUCTURE

#88
20080190522
2008-08-14

Process for Heat Treatment of Steel or Cast Iron Workpieces

#89
20070289678
2007-12-20

Device for cooling long objects

#90
20070193666
2007-08-23

High Strength Dual Phase Steel With Low Yield Ratio, High Toughness and Superior Weldability

#91
20070175548
2007-08-02

Method and installation for the production of hot-rolled strip having a dual-phase structure

#92
20070012386
2007-01-18

High strength steel plate

#93
20060249232
2006-11-09

Coil winding method for metal in bars

#94
20060185774
2006-08-24

Hot forming method and a hot formed member

#95
20060162826
2006-07-27

Method for making an abrasion resistant steel plate and plate obtained

#96
20060144483
2006-07-06

Method for making an abrasion-resistant steel plate

#97
20060137780
2006-06-29

Method for making an abrasion-resistant steel plate

#98
20060011274
2006-01-19

Method for producing steel with retained austenite

#99
20050155673
2005-07-21

High strength hot rolled steel sheet superior in workability, fatigue property, and surface quality

#100
20050133120
2005-06-23

Carbide method and article for hard finishing resulting in improved wear resistance

#101
20050106411
2005-05-19

High strength steel plate and method for production thereof

#102
14608169
2017-12-26

Cylinder liner and method of forming the same