ClassID:

118931

C21D1/40 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering; Methods of heating Direct resistance heating

Recent Application in this class:
#1
20260042138
2026-02-12

COIL SPRING MANUFACTURING METHOD

#2
20260022432
2026-01-22

MANUFACTURING METHOD OF STABILIZER AND STABILIZER

#3
20250271213
2025-08-28

CONTINUOUS, HIGH-TEMPERATURE SLAB PREHEATING PLANT FOR FLAT SEMI-FINISHED STEEL PRODUCTS

#4
20250207214
2025-06-26

HEATING METHOD AND HEATING SYSTEM

#5
20240263262
2024-08-08

MONOCRYSTALLINE METAL FOIL AND MANUFACTURING METHOD THEREFOR

#6
20240183010
2024-06-06

WIREDRAWN PRODUCT AND METHOD FOR MANUFACTURING WIREDRAWN PRODUCT

#7
20220134406
2022-05-05

Modification of a deep-drawing sheet blank for electric resistance heating

#8
20220033928
2022-02-03

Hot-band annealing equipment, hot-band annealing method and descaling method for Si-containing hot rolled steel sheet

#9
20210299722
2021-09-30

Micro control device for simulating electric thermal field change of plate/strip

#10
20210039355
2021-02-11

Hot-stamped body

#11
20210039354
2021-02-11

Hot-stamped body

#12
20210002736
2021-01-07

Monocrystalline metal foil and manufacturing method therefor

#13
20200392599
2020-12-17

METHOD FOR HEATING STEEL PLATE AND METHOD FOR MANUFACTURING HOT-PRESSED PRODUCT

#14
20200392597
2020-12-17

Apparatus for heating steel sheet

#15
20200391273
2020-12-17

Electrical heating apparatus

#16
20200367321
2020-11-19

Direct resistance heating apparatus, direct resistance heating method, heating apparatus, heating method, and hot-press molding method

#17
20190276913
2019-09-12

Method of continuously annealing a strip

#18
20190136335
2019-05-09

HIGHLY ALLOYED STAINLESS STEEL FORGINGS MADE WITHOUT SOLUTION ANNEAL

#19
20190061043
2019-02-28

Method for manufacturing joined member and joined member manufacturing apparatus

#20
20190039109
2019-02-07

Device for Producing Hardened Steel Components and Hardening Method

#21
20190030584
2019-01-31

HEATING METHOD, HEATING APPARATUS, AND HOT PRESS MOLDING METHOD FOR PLATE WORKPIECE

#22
20190002998
2019-01-03

Low Alloy Steels with Enhanced Toughness and Fatigue Strength at High Hardness

#23
20180334735
2018-11-22

Method for manufacturing an austenitic steel component and use of the component

#24
20180305783
2018-10-25

HIGH STRENGTH STEEL SHEET AND MANUFACTURING METHOD THEREFOR

#25
20180243814
2018-08-30

Method of manufacturing rolling bearing ring

#26
20180237872
2018-08-23

Device and method for tempering sections of metal components

#27
20180223385
2018-08-09

Increasing steel impact toughness

#28
20180187282
2018-07-05

Method of heat treatment

#29
20180116013
2018-04-26

AUTOMATIC CONTROLLED ELECTRIC HEATING EQUIPMENT FOR PRODUCTION OF HIGH RESISTANCE PARTS

#30
20180099324
2018-04-12

Production process for stamped parts of high mechanical resistance, through controlled electric heating

#31
20180072127
2018-03-15

Stabilizer and method for manufacturing same

#32
20180070409
2018-03-08

Heat treatment of helical springs or similarly shaped articles by electric resistance heating

#33
20180044746
2018-02-15

Batch furnace for annealing material and method for heat treatment

#34
20180029103
2018-02-01

Heating method, heating apparatus and method for manufacturing press-molded article

#35
20180015522
2018-01-18

HIGH-SPEED HOT FORMING AND DIRECT QUENCHING

#36
20170314094
2017-11-02

HEATING METHOD, HEATING APPARATUS, AND FABRICATION METHOD FOR PRESS-MOLDED ARTICLE

#37
20170282282
2017-10-05

Electrical bonding method

#38
20170247774
2017-08-31

CONTINUOUS TAILOR HEAT-TREATED BLANKS

#39
20170226615
2017-08-10

Method for producing aluminum wire

#40
20170226609
2017-08-10

METHOD FOR PRODUCTION OF A NITRIDED PACKAGING STEEL

#41
20170218473
2017-08-03

Method for heating steel sheets and device for carrying out the method

#42
20170203358
2017-07-20

Feedback-assisted rapid discharge heating and forming of metallic glasses

#43
20170175216
2017-06-22

ELECTRICAL HEATING DEVICE

#44
20170166986
2017-06-15

Highly alloyed stainless steel forgings made without solution anneal

#45
20170164425
2017-06-08

Heating method, heating apparatus and method of manufacturing press-molded article

#46
20170144207
2017-05-25

HOT FORMING LINE AND METHOD FOR PRODUCING A HOT FORMED AND PRESS HARDENED MOTOR VEHICLE PART

#47
20170087615
2017-03-30

Direct resistance heating method and press-molded product manufacturing method

#48
20170069819
2017-03-09

Hydrogen free amorphous silicon as insulating dielectric material for superconducting quantum bits

#49
20170051375
2017-02-23

Method for the heat treatment of a steel reinforcement element for tires

#50
20170044637
2017-02-16

Method and system for enhancing rivetability

#51
20170021691
2017-01-26

STEEL FOR VEHICLE SUSPENSION SPRING PART, VEHICLE SUSPENSION SPRING PART, AND METHOD OF FABRICATING THE SAME

#52
20160355903
2016-12-08

Apparatus for continuous annealing of strip and method for continuous annealing of same

#53
20160298205
2016-10-13

Forming of metallic glass by rapid capacitor discharge

#54
20160255680
2016-09-01

Heating apparatus and heating furnace

#55
20160193687
2016-07-07

RESISTANCE WELDING METHOD FOR SUCKER ROD

#56
20160160326
2016-06-09

Method and device for partially hardening semifinished products

#57
20160136712
2016-05-19

HEATING METHOD, HEATING APPARATUS, AND HOT PRESS MOLDING METHOD FOR PLATE WORKPIECE

#58
20160083821
2016-03-24

Steel material, material processing method, and material processing apparatus

#59
20150344986
2015-12-03

Heat treatment apparatus for hot stamping and forming method using the same

#60
20150299817
2015-10-22

Method for strengthening steel plate member

#61
20150211085
2015-07-30

HEAT TREATMENT FOR VEHICLE SEAT STRUCTURES AND COMPONENTS

#62
20150208466
2015-07-23

Direct resistance heating method

#63
20150197837
2015-07-16

Methods for shaping high aspect ratio articles from metallic glass alloys using rapid capacitive discharge and metallic glass feedstock for use in such methods

#64
20150184267
2015-07-02

Method for manufacturing stabilizer, and heating device

#65
20150176904
2015-06-25

Sample holder annealing apparatus using the same

#66
20150174983
2015-06-25

Method for producing stabilizer and heating device

#67
20150173126
2015-06-18

Current applying apparatus, current applying method and direct resistance heating apparatus

#68
20150173125
2015-06-18

Direct resistance heating method

#69
20150159234
2015-06-11

Post-treating a hardened metal formed part

#70
20150129089
2015-05-14

Hydrogen-free amorphous dielectric insulating thin films with no tunneling states

#71
20150122376
2015-05-07

Site conditions thick-wall P92 pipe local heat treatment method

#72
20150096967
2015-04-09

Feedstock barrels coated with insulating films for rapid discharge forming of metallic glasses

#73
20150090375
2015-04-02

Cellulosic and synthetic polymeric feedstock barrel for use in rapid discharge forming of metallic glasses

#74
20140366993
2014-12-18

Method of carburizing

#75
20140345351
2014-11-27

Apparatus for electrical-assisted incremental forming and process thereof

#76
20140209597
2014-07-31

Electric heating device

#77
20140123722
2014-05-08

Energization heating device and method

#78
20140102163
2014-04-17

Forming of metallic glass by rapid capacitor discharge forging

#79
20140047888
2014-02-20

Sheet forming of metallic glass by rapid capacitor discharge

#80
20140033787
2014-02-06

Forming of metallic glass by rapid capacitor discharge

#81
20130334187
2013-12-19

Wire electrode annealing processing method and wire electric discharge machining device

#82
20130327743
2013-12-12

Heat treatment of helical springs or similarly shaped articles by electric resistance heating

#83
20130213298
2013-08-22

Production facility and production process for hot dip galvannealed steel plate

#84
20130153092
2013-06-20

Method of production of welded joint

#85
20130119045
2013-05-16

Method for producing spring

#86
20130025814
2013-01-31

Injection molding of metallic glass by rapid capacitor discharge

#87
20130001222
2013-01-03

Forming of ferromagnetic metallic glass by rapid capacitor discharge

#88
20120255338
2012-10-11

Sheet forming of metallic glass by rapid capacitor discharge

#89
20120217227
2012-08-30

METHOD OF INTRODUCING COMPRESSIVE STRESS IN A WELDED JOINT

#90
20120205361
2012-08-16

Method of heating plated steel plate

#91
20120193336
2012-08-02

Energization heating method and energization heating device

#92
20120133089
2012-05-31

Heat treatment furnace

#93
20120132625
2012-05-31

Forming of metallic glass by rapid capacitor discharge forging

#94
20120085467
2012-04-12

Fabrication process of coated stamped parts

#95
20120055217
2012-03-08

Electrical-assisted double side incremental forming and processes thereof

#96
20110247383
2011-10-13

Manufacture of coil springs

#97
20110042369
2011-02-24

Heating equipment for a plate to be heated and heating method

#98
20110031666
2011-02-10

Heat treatment of helical springs or similarly shaped articles by electric resistance heating

#99
20100285328
2010-11-11

Press-forming method and press-formed part

#100
20100269559
2010-10-28

CONDUCTION HEATING APPARATUS AND HOT PRESS FORMING APPARATUS HAVING THE SAME, AND CONDUCTION HEATING METHOD

#101
20100264129
2010-10-21

Electrode support structure and electric heating device having same

#102
20100200126
2010-08-12

Production facility and production process for hot dip galvannealed steel plate

#103
20100089888
2010-04-15

Apparatuses and methods for welding and for improving fatigue life of a welded joint

#104
20100089147
2010-04-15

Fail-safe pitot cover for a variety of pitot designs

#105
20090261077
2009-10-22

HEAT TREATMENT HOLDER AND HEAT TREATMENT APPARATUS AND METHOD

#106
20090236017
2009-09-24

Forming of metallic glass by rapid capacitor discharge

#107
20090229715
2009-09-17

Method for manufacturing wire, apparatus for manufacturing wire, and copper alloy wire

#108
20090152256
2009-06-18

METHOD FOR MANUFACTURING A STAMPED/HEATED PART FROM A STEEL SHEET PLATED WITH ALUMINUM ALLOY

#109
20090065494
2009-03-12

Systems and methods for providing localized heat treatment of gas turbine components

#110
20080302775
2008-12-11

Metal forming apparatus and process with resistance heating

#111
20080105023
2008-05-08

METHOD OF FORMING A PANEL FROM A METAL ALLOY SHEET

#112
20060060570
2006-03-23

Metal forming apparatus and process with resistance heating

#113
20050126248
2005-06-16

Apparatus and method for thermomechanically forming an aluminide part of a workpiece

#114
20050028574
2005-02-10

Flat metal, production device and production method

#115
18145938
2024-04-09

Methods for tempering of steel for riveting