ClassID:

118959

C21D1/78 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering Combined heat-treatments not provided for above

Sub-classes:
Recent Application in this class:
#1
20240263265
2024-08-08

HIGH STRENGTH STEEL PRODUCTS AND ANNEALING PROCESSES FOR MAKING THE SAME

#2
20210164083
2021-06-03

Copper-coated steel wire and stranded wire

#3
20200291497
2020-09-17

METHOD OF MAKING STAINLESS STEEL

#4
20200040422
2020-02-06

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

#5
20190390291
2019-12-26

ANNEALING PROCESSES FOR MAKING HIGH STRENGTH STEEL PRODUCTS

#6
20190062864
2019-02-28

High strength annealed steel products

#7
20190062855
2019-02-28

Method for heat treating an iron-carbon alloy

#8
20180066346
2018-03-08

Grain-oriented electrical steel sheet and method for manufacturing same

#9
20170327924
2017-11-16

High strength steel products and annealing processes for making the same

#10
20170321292
2017-11-09

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

#11
20160010192
2016-01-14

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

#12
20160002746
2016-01-07

Method for heat-treating a manganese steel product and manganese steel product

#13
20150152515
2015-06-04

Methods And Apparatus For Stress Relief Using Multiple Energy Sources

#14
20150143861
2015-05-28

Plastic working method of metals and plastic working apparatus

#15
20150101713
2015-04-16

Method and apparatus for treating a steel article

#16
20150034218
2015-02-05

High strength cold rolled steel sheet

#17
20140342181
2014-11-20

Zinc-coated steel for press hardening applications and method of production

#18
20140322559
2014-10-30

High-strength flat steel product and method for producing same

#19
20140261902
2014-09-18

Method and apparatus for treating a steel article

#20
20130333811
2013-12-19

Method and apparatus for treating a steel article

#21
20120144635
2012-06-14

METHODS AND SYSTEMS FOR MANUFACTURING AN AXLE

#22
20120125492
2012-05-24

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

#23
20120118434
2012-05-17

STEEL MEMBER HAVING NITROGEN COMPOUND LAYER AND PROCESS FOR PRODUCING SAME

#24
20120051682
2012-03-01

BEARING PART, HEAT TREATMENT METHOD THEREOF, AND ROLLING BEARING

#25
20120014635
2012-01-19

Mechanical component and rolling bearing

#26
20110284526
2011-11-24

CLAMPING APPARATUS AND METHOD OF HEAT-TREATING A LONG MATERIAL

#27
20100301036
2010-12-02

METHODS AND APPARATUS FOR STRESS RELIEF USING MULTIPLE ENERGY SOURCES

#28
20100252150
2010-10-07

Heat treatment method of pin for endless track

#29
20100239205
2010-09-23

Mechanical component and rolling bearing

#30
20100051141
2010-03-04

METHOD FOR ENHANCING FRETTING FATIGUE RESISTANCE OF ALLOYS

#31
20090320263
2009-12-31

Methods for manufacturing an axle

#32
20090283941
2009-11-19

Method for boltless heat treatment of thin flanges

#33
20090020194
2009-01-22

Method of Induction Hardening

#34
20090020191
2009-01-22

Post weld heat treatment for chemically stabilized austenitic stainless steel

#35
20090000708
2009-01-01

Method for manufacture of complex heat treated tubular structure

#36
20080277030
2008-11-13

Composition and Process for Enhanced Properties of Ferrous Components

#37
20080264528
2008-10-30

ROLLING, SLIDING PART AND PROCESS FOR PRODUCING SAME

#38
20080244892
2008-10-09

Method For Producing a Shaft Pertaining to a Starter

#39
20080156399
2008-07-03

High-Concentration Carburized/Low-Strain Quenched Member and Process for Producing the Same

#40
20080134488
2008-06-12

Method for producing an injector body and corresponding injector body

#41
20080128052
2008-06-05

Method and process for thermochemical treatment of high-strength, high-toughness alloys

#42
20080105339
2008-05-08

Methods and apparatus for stress relief using multiple energy sources

#43
20080006351
2008-01-10

Boundary layer improvement of plate springs or undulating springs

#44
20070251609
2007-11-01

Ultratough high-strength weldable plate steel and method of manufacture thereof

#45
20070194504
2007-08-23

Heat Treatment System

#46
20070169850
2007-07-26

Rolling bearing and heat treatment method for steel

#47
20070163683
2007-07-19

Method for producing a component by reshaping a plate, and device for carrying out said method

#48
20070119526
2007-05-31

Method and apparatus for boltless heat treatment of thin flanges

#49
20060243352
2006-11-02

Process for producing steel products having improved grain size properties and machinability

#50
20060169374
2006-08-03

Process for the production of an articulated structural part having improved wear resistance

#51
20060021682
2006-02-02

Ultratough high-strength weldable plate steel

#52
20060021679
2006-02-02

Rolling element and method of producing the same

#53
20050269074
2005-12-08

Case hardened stainless steel oilfield tool

#54
20050205163
2005-09-22

Bearing part, heat treatment method thereof, and rolling bearing

#55
20050109428
2005-05-26

Transmission chain

#56
20050092402
2005-05-05

Methods and apparatus for stress relief using multiple energy sources

#57
20050092396
2005-05-05

Rolling bearing for belt driven continuously variable transmission

#58
20050045248
2005-03-03

Contact pressure-resistant member and method of making the same

#59
20050045247
2005-03-03

Bearing's component, heat treatment method thereof, heat treatment apparatus, and rolling bearing

#60
20050039825
2005-02-24

Hardened steel components and process of treating the same

#61
20050028904
2005-02-10

Method for manufacturing steel parts by continuous copper-brazing and quench hardening