ClassID:

118927

C21D1/30 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering; Methods of annealing Stress-relieving

Recent Application in this class:
#1
20260103771
2026-04-16

NON-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR PRODUCING THE SAME, AND MOTOR CORE

#2
20250230533
2025-07-17

LOW TEMPERATURE HARDENABLE STEELS WITH EXCELLENT MACHINABILITY

#3
20250223664
2025-07-10

Grain-Oriented Flat Steel Product and Method for Its Production

#4
20250182949
2025-06-05

THREE-PHASE THREE-LEGGED WOUND CORE AND METHOD FOR PRODUCTION THEREOF

#5
20250146093
2025-05-08

NON-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR PRODUCING THE SAME

#6
20250129830
2025-04-24

MANUFACTURING METHOD FOR A WORKPIECE WITH A REFINEMENT LAYER, AND WORKPIECE WITH A REFINEMENT LAYER

#7
20250075281
2025-03-06

BRAKE DISC AND MANUFACTURING METHOD THEREOF

#8
20250066892
2025-02-27

NON-ORIENTED ELECTRICAL STEEL SHEET AND MOTOR CORE COMPRISING SAME

#9
20250059618
2025-02-20

NON-ORIENTED ELECTRICAL STEEL SHEET, METHOD FOR MANUFACTURING SAME, AND MOTOR CORE COMPRISING SAME

#10
20250022639
2025-01-16

NON-ORIENTED ELECTRICAL STEEL SHEET, IRON CORE AND MOTOR CORE, AND METHOD FOR MANUFACTURING IRON CORE AND MOTOR CORE

#11
20250012382
2025-01-09

STEEL PIPE FOR OIL CYLINDER AND MANUFACTURING METHOD THEREFOR

#12
20250011890
2025-01-09

Methods and Apparatuses Related to Payload Launch Vehicles

#13
20240367232
2024-11-07

ELECTRON BEAM ADDITIVE MANUFACTURING SYSTEM AND CONTROL COMPONENTS

#14
20240344163
2024-10-17

Methods and Apparatuses Related to Payload Launch Vehicles

#15
20240321492
2024-09-26

WOUND CORE AND METHOD FOR PRODUCING WOUND CORE

#16
20240271241
2024-08-15

METHOD FOR MANUFACTURING GRAIN-ORIENTED ELECTRICAL STEEL SHEET

#17
20240254610
2024-08-01

Hot-Formed Steel Part and Manufacturing Method

#18
20240233990
2024-07-11

NON-ORIENTED ELECTRICAL STEEL SHEET AND MANUFACTURING METHOD THE SAME

#19
20240077123
2024-03-07

Valve spring

#20
20240047105
2024-02-08

Non-oriented electrical steel sheet

#21
20240013959
2024-01-11

NON ORIENTED ELECTRICAL STEEL SHEET, IRON CORE, MANUFACTURING METHOD OF IRON CORE, MOTOR, AND MANUFACTURING METHOD OF MOTOR

#22
20230392244
2023-12-07

Steel wire

#23
20230357876
2023-11-09

Method of Manufacturing High Strength Steel Tubing from a Steel Composition and Components Thereof

#24
20230296152
2023-09-21

Damper spring

#25
20230160843
2023-05-25

METHOD FOR MANUFACTURING REFERENCE PIECE FOR X-RAY MEASUREMENT OF RESIDUAL STRESS AND REFERENCE PIECE FOR X-RAY MEASUREMENT OF RESIDUAL STRESS

#26
20230101304
2023-03-30

Low temperature hardenable steels with excellent machinability

#27
20230072974
2023-03-09

METHOD OF MANUFACTURING CAST IRON COMPONENTS FOR INDUSTRIAL EQUIPMENT

#28
20220316802
2022-10-06

Vacuum forming method

#29
20220195551
2022-06-23

High strength steel tube and method of manufacturing a high strength steel tube

#30
20220074033
2022-03-10

STEEL WIRE

#31
20210402481
2021-12-30

Electron beam additive manufacturing system and control components

#32
20200362433
2020-11-19

Method for manufacturing stress-relief-annealing-resistant, low-iron-loss grain-oriented silicon steel

#33
20200300546
2020-09-24

Vacuum forming method

#34
20200199702
2020-06-25

WEAR-RESISTANT STEEL SHEET HAVING EXCELLENT TOUGHNESS AND PRODUCTION METHOD

#35
20200032367
2020-01-30

Cold rolled steel wire, method and reinforcement of flexible conduits

#36
20200010918
2020-01-09

Method for producing non-oriented electrical steel sheet, method for producing motor core, and motor core

#37
20190237229
2019-08-01

Soft magnetic alloy and magnetic device

#38
20190161822
2019-05-30

High-strength steel sheet and method for producing same

#39
20190010567
2019-01-10

Adhesive coating composition for non-oriented electrical steel sheet, non-oriented electrical steel sheet product, and manufacturing method therefor

#40
20180371594
2018-12-27

Solid-state welding of coarse grain powder metallurgy nickel-based superalloys

#41
20180312936
2018-11-01

Composition for forming insulation film of oriented electrical steel sheet, method for forming insulation film by using same, and oriented electrical steel sheet having insulation film formed therein

#42
20180282829
2018-10-04

Method and fixture for counteracting tensile stress

#43
20180237883
2018-08-23

METHOD FOR PRODUCING JOURNAL PART OF 9 TO 12% Cr STEEL TURBINE ROTOR, AND JOURNAL PART PRODUCED BY THE METHOD

#44
20180231102
2018-08-16

METHOD FOR MANUFACTURING ENDLESS METAL BELT, ENDLESS METAL BELT, AND BELT-TYPE CONTINUOUSLY VARIABLE TRANSMISSION

#45
20180094333
2018-04-05

Stress-relief heat treatment apparatus

#46
20180080107
2018-03-22

Method for relieving residual stress in cast-in-place liners of HPDC engine blocks

#47
20180051751
2018-02-22

Manufacturing method of precision machine tool bearing with high precision stability

#48
20180051351
2018-02-22

Aluminum foil annealing furnace

#49
20180044756
2018-02-15

Tooling for stress relieving a turbine wheel and shaft

#50
20180027663
2018-01-25

PIN-DIVERGING DEVICE FOR RELEASING STRESSES AND CAPACITOR DETECTION SYSTEM

#51
20170369976
2017-12-28

ULTRA-HIGH STRENGTH THERMO-MECHANICALLY PROCESSED STEEL

#52
20170363355
2017-12-21

Vacuum forming method

#53
20170360998
2017-12-21

BIODEGRADABLE ALLOY WIRE FOR MEDICAL DEVICES

#54
20170260600
2017-09-14

Non-oriented electrical steel sheet and method for producing the same, and motor core and method of producing the same

#55
20170239755
2017-08-24

Metal plate for laser processing and method for producing stainless steel plate for laser processing

#56
20170218999
2017-08-03

Fasteners

#57
20170113269
2017-04-27

Shot sleeve for die casting apparatus and method of fabricating same

#58
20170059529
2017-03-02

ADAPTIVE ADDITIVE MANUFACTURING PROCESS USING IN-SITU LASER ULTRASONIC TESTING

#59
20170028437
2017-02-02

Selective annealing process for perforation guns

#60
20170021062
2017-01-26

METHOD OF PRODUCING AN IMPLANT

#61
20170016574
2017-01-19

Stress relieved welds in positive expulsion fuel tanks with elastomeric diaphragm

#62
20170009314
2017-01-12

Piston ring and its production method

#63
20160325620
2016-11-10

Stress relieved welds in positive expulsion fuel tanks with rolling metal diaphragms

#64
20160322138
2016-11-03

Coating agent for electrical steel sheet, manufacturing method therefor and electrical steel sheet coating method using same

#65
20160319392
2016-11-03

Cold rolled steel wire, method and reinforcement of flexible conduits

#66
20160288200
2016-10-06

Ultrahigh temperature elastic metal composites

#67
20160265096
2016-09-15

Method for the production of a highly stressable component from an α+γ-titanium aluminide alloy for reciprocating-piston engines and gas turbines, especially aircraft engines

#68
20160222481
2016-08-04

SYSTEM AND METHOD FOR ANNEALING OF AN ITEM, WHICH COMPRISES HEAT-SENSITIVE PARTS AND ANNEALED ITEM

#69
20160178093
2016-06-23

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

#70
20160145711
2016-05-26

Method for producing journal part of 9 to 12% Cr steel turbine rotor, and journal part produced by the method

#71
20160144946
2016-05-26

Extrados structural element made from an aluminium copper lithium alloy

#72
20160138992
2016-05-19

Conditioned isolation elements and sensor assemblies

#73
20160107554
2016-04-21

Method for stabilizing and/or for reducing tensions occurring within the wall-like structure by means of laser welding

#74
20160107293
2016-04-21

High temperature high heating rate treatment of PDC cutters

#75
20160102376
2016-04-14

Method of forming golf club head assembly

#76
20160076315
2016-03-17

Method for manufacturing superior 13Cr friction-welded drillrod

#77
20160032415
2016-02-04

Heat treat production fixture

#78
20160017453
2016-01-21

Method for producing a motor vehicle component, and a body component

#79
20150368765
2015-12-24

Nano-pearlite rail and process for manufacturing same

#80
20150259771
2015-09-17

High strength low alloy steel and method of manufacturing

#81
20150247214
2015-09-03

Steel plate having yield strength of 670 to 870 N/mmand tensile strength of 780 to 940 N/mm

#82
20150232972
2015-08-20

Non-normalized steel composition and connecting rod using the same, and method of manufacturing the connecting rod

#83
20150217392
2015-08-06

Method for installing a first machine part into a second machine part

#84
20150211087
2015-07-30

STRESS-RELIEF HEAT TREATMENT APPARATUS

#85
20150206996
2015-07-23

Solar cell substrate made of stainless steel foil and method for manufacturing the same

#86
20150167781
2015-06-18

Method for manufacturing endless metal belt, endless metal belt, and belt-type continuously variable transmission

#87
20150122376
2015-05-07

Site conditions thick-wall P92 pipe local heat treatment method

#88
20150118098
2015-04-30

Low temperature hardenable steels with excellent machinability

#89
20150037160
2015-02-05

Turbine rotor

#90
20140116578
2014-05-01

High-strength and high-toughness steel plate with yield strength of 700 MPa and method of manufacturing the same

#91
20140105751
2014-04-17

Method for manufacturing machine component, and rotary machine equipped with impeller manufactured by means of this method

#92
20140087320
2014-03-27

Method of reheating rail weld zone

#93
20140027082
2014-01-30

Stress free steel and rapid production of same

#94
20130333190
2013-12-19

Method for bending sheet metal and product of sheet metal

#95
20130301969
2013-11-14

Method for producing a bearing ring

#96
20130264123
2013-10-10

Methods of manufacturing steel tubes for drilling rods with improved mechanical properties, and rods made by the same

#97
20130263521
2013-10-10

High temperature high heating rate treatment of PDC cutters

#98
20130125607
2013-05-23

Method for producing a structural part from an iron-manganese steel sheet

#99
20130101949
2013-04-25

Method for generating a stress reduction in erected tube walls of a steam generator

#100
20130019649
2013-01-24

Incremental forging

#101
20130011295
2013-01-10

Nickel-chromium-cobalt-molybdenum alloy

#102
20120279619
2012-11-08

TREATMENT FOR PREVENTING STRESS CORROSION CRACKING

#103
20120090739
2012-04-19

High strength valve spring for vehicle engine and method of manufacturing the same

#104
20110318219
2011-12-29

Implant and method for producing the same

#105
20110253272
2011-10-20

Method for manufacturing safety vent on cover of lithium-ion battery

#106
20110232808
2011-09-29

Method for producing a motor vehicle component, and a body component

#107
20110036467
2011-02-17

Stress free steel and rapid production of same

#108
20110036141
2011-02-17

Incremental forging

#109
20100326974
2010-12-30

Method for improving residual stress in tubular body

#110
20100322814
2010-12-23

High-strength steel sheet excellent in resistance to stress-relief annealing and low temperature joint toughness

#111
20100301036
2010-12-02

METHODS AND APPARATUS FOR STRESS RELIEF USING MULTIPLE ENERGY SOURCES

#112
20100140230
2010-06-10

METHOD FOR THE MANUFACTURE OF A WELDED ROTOR FOR A GAS-TURBINE ENGINE

#113
20100122972
2010-05-20

Apparatus for improving residual stress in tubular body and adjustment method of the same

#114
20100108653
2010-05-06

Method for improving residual stress in tubular body and apparatus for improving residual stress in tubular body

#115
20100059491
2010-03-11

APPARATUS FOR IMPROVING RESIDUAL STRESS IN TUBULAR BODY

#116
20090302012
2009-12-10

METHOD AND SYSTEM FOR IMPROVING RESIDUAL STRESS IN TUBE BODY

#117
20090246067
2009-10-01

High-strength steel sheet excellent in resistance to stress-relief annealing and in low-temperature joint toughness

#118
20090090767
2009-04-09

METHOD AND SYSTEM FOR RESTORING PARENT METAL PROPERTIES ACROSS WELDS

#119
20090084830
2009-04-02

Tool assembly heat treatment method

#120
20090049912
2009-02-26

Method for relieving residual stress in an object

#121
20090039117
2009-02-12

Eyeless sewing needle and fabrication method for the same

#122
20090020191
2009-01-22

Post weld heat treatment for chemically stabilized austenitic stainless steel

#123
20080265553
2008-10-30

Process for manufacturing an airbag inflator bottle member

#124
20080257458
2008-10-23

Method for case hardening a component by means of oil jets and device for carrying out said method

#125
20080236237
2008-10-02

Method of making a metallic thin wire for a medical tool

#126
20080210741
2008-09-04

WELD REPAIR AS A COMBINED HEAT TREATMENT BRAZING PROCESS FOR METALLIC COMPONENTS

#127
20080110229
2008-05-15

Mechanical stress improvement process

#128
20080105339
2008-05-08

Methods and apparatus for stress relief using multiple energy sources

#129
20080105023
2008-05-08

METHOD OF FORMING A PANEL FROM A METAL ALLOY SHEET

#130
20080042327
2008-02-21

System for Extending the Life of Thin Walled Tubing and Austempered Weld Stress Relieved Thin Walled Tubing

#131
20080029927
2008-02-07

Method and apparatus for heat-treating an article and a fixture for use in the same

#132
20070224041
2007-09-27

Turbine casing

#133
20070175873
2007-08-02

Apparatus for improving residual stress of piping technical field

#134
20060179974
2006-08-17

Weld metal excellent in low temperature toughness and SR cracking resistance used for high-strength Cr-Mo steel

#135
20060179909
2006-08-17

Method of making a metallic thin wire for a medical tool

#136
20060060267
2006-03-23

Method for extending the life of thin walled tubing and austempered weld stress relieved thin walled tubing

#137
20050183461
2005-08-25

Method for producing an optical component

#138
20050133482
2005-06-23

Method and apparatus for heat-treating an article and a fixture for use in the same

#139
20050115646
2005-06-02

Stress free steel and rapid production of same

#140
20050092402
2005-05-05

Methods and apparatus for stress relief using multiple energy sources

#141
20050081964
2005-04-21

A Method Of Establishing Stress Relieving Procedures For Minimizing Sulfide Stress Cracking In Cold Worked Metals

#142
20050028902
2005-02-10

Method for manufacturing a leaf spring

#143
20050022572
2005-02-03

Method of making a metallic thin wire and a medical tool into which the metallic thin wire is incorporated

#144
18901033
2025-07-15

Electrical steel with low iron loss and method for controlling tension thereof during decarburization annealing

#145
18768250
2025-05-06

Efficient preparation method of bimetallic seamless composite pipe

#146
15355620
2017-09-26

Cold-formed tank head for railroad tank car