ClassID:

118915

C21D1/06 - page 2 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering Surface hardening

Recent Application in this class:
#301
20130156630
2013-06-20

Steel for induction hardening and crankshaft manufactured using the same

#302
20130146181
2013-06-13

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

#303
20130146180
2013-06-13

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

#304
20130105454
2013-05-02

Thermal treatment method for micromechanical horological parts

#305
20130087250
2013-04-11

Steel for nitriding and nitrided part

#306
20130020000
2013-01-24

Method of forming a stamped article

#307
20130019666
2013-01-24

Bearing part, bearing, and method for inspecting bearing part

#308
20130008566
2013-01-10

Spring and method for producing same

#309
20130004883
2013-01-03

High-nitrogen stainless-steel pipe with high strength high ductility, and excellent corrosion and heat resistance

#310
20120328963
2012-12-27

Negative electrode and aluminum air cell

#311
20120325373
2012-12-27

METHOD FOR TREATMENT OF METAL SURFACE, AND SURFACE-MODIFIED METAL PRODUCT

#312
20120318408
2012-12-20

STEEL PART EXCELLENT IN TEMPER SOFTENING RESISTANCE

#313
20120318407
2012-12-20

Spring steel and surface treatment method for steel material

#314
20120312425
2012-12-13

Gas-carburized steel part excellent in surface fatigue strength, steel product for gas carburizing, and manufacturing method of gas-carburized steel part

#315
20120312159
2012-12-13

MACHINE COMPONENT WITH A CAVITATION RESISTANT COVERING

#316
20120291923
2012-11-22

Method of manufacturing a laminar ring

#317
20120282480
2012-11-08

HIGH-TEMPERATURE MATERIAL TRANSFERRING MEMBER

#318
20120273092
2012-11-01

Method for manufacturing a hot press-hardened component and use of a steel product for manufacturing a hot press-hardened component

#319
20120267010
2012-10-25

Composite steel part and manufacturing method for the same

#320
20120267009
2012-10-25

Composite steel part and manufacturing method for the same

#321
20120247619
2012-10-04

Carburized steel and its process of manufacture

#322
20120216642
2012-08-30

Tempered steel

#323
20120186703
2012-07-26

NITRIDING OF NIOBIUM STEEL AND PRODUCT MADE THEREBY

#324
20120177457
2012-07-12

Method of manufacturing gear

#325
20120177437
2012-07-12

Parts welded in a rotationally symmetrical manner

#326
20120168035
2012-07-05

Steel for machine structural use, manufacturing method for same, case hardened steel component, and manufacturing method for same

#327
20120156520
2012-06-21

Hardfacing process and parts produced thereby

#328
20120132326
2012-05-31

Method for producing martensitic steel with mixed hardening

#329
20120121453
2012-05-17

HIC-RESISTANT THICK STEEL PLATE AND UOE STEEL PIPE

#330
20120118434
2012-05-17

STEEL MEMBER HAVING NITROGEN COMPOUND LAYER AND PROCESS FOR PRODUCING SAME

#331
20120085469
2012-04-12

METHOD FOR MANUFACTURING PROJECTION MATERIALS FOR A SHOT PEENING

#332
20120085465
2012-04-12

Carburized component and manufacturing method

#333
20120080122
2012-04-05

Steel for nitriding use and nitrided part

#334
20120060979
2012-03-15

CARBURIZED STEEL PART HAVING EXCELLENT LOW CYCLE BENDING FATIGUE STRENGTH

#335
20120060977
2012-03-15

Method of manufacturing carburized parts

#336
20120055587
2012-03-08

Method of manufacturing a bearing ring

#337
20120048427
2012-03-01

Steel for nitrocarburizing, nitrocarburized steel part, and producing method of nitrocarburized steel part

#338
20120028031
2012-02-02

IRON-BASED SINTERED MATERIAL

#339
20120018063
2012-01-26

CASE-HARDENED STEEL SUPERIORIN COLD WORKABILITY, MACHINABILITY, AND FATIGUE CHARACTERISTICS AFTER CARBURIZED QUENCHING AND METHOD OF PRODUCTION OF SAME

#340
20120014635
2012-01-19

Mechanical component and rolling bearing

#341
20120014626
2012-01-19

Martensitic-steel casting material and process for producing martensitic cast steel product

#342
20120006451
2012-01-12

CARBON STEEL SHEET HAVING EXCELLENT CARBURIZATION PROPERTIES, AND METHOD FOR PRODUCING SAME

#343
20120000336
2012-01-05

Steel Alloy

#344
20110315275
2011-12-29

Method of treating parts for kitchen utensils

#345
20110308487
2011-12-22

Method for linking elements to hollow shafts, preferably for producing camshafts, and resulting camshaft

#346
20110284133
2011-11-24

CARBONITRIDED PART AND PROCESS FOR PRODUCING CARBONITRIDED PART

#347
20110277886
2011-11-17

NITRIDING OF NIOBIUM STEEL AND PRODUCT MADE THEREBY

#348
20110274946
2011-11-10

CAST BODY

#349
20110243488
2011-10-06

Bearing constituent member and process for producing the same, and rolling bearing having bearing constituent member

#350
20110240374
2011-10-06

Downhole tool having a friction stirred surface region

#351
20110186186
2011-08-04

Iron and steel material having quenched surface layer part, method for producing the iron and steel material, and quenched component

#352
20110162758
2011-07-07

FURNACE OF HEAT TREATMENT, THE METHOD OF HEAT TREATMENT, AND THE DIRECTIONS FOR USE OF FURNACE OF HEAT TREATMENT

#353
20110076419
2011-03-31

METHOD FOR DEVELOPING FINE GRAINED, THERMALLY STABLE METALLIC MATERIAL

#354
20110041959
2011-02-24

STEEL FOR MACHINE STRUCTURE USE FOR SURFACE HARDENING AND STEEL PART FOR MACHINE STRUCTURE USE

#355
20110036463
2011-02-17

Carburized steel part

#356
20110017351
2011-01-27

Nitrocarburized raw material for crankshafts and method for manufacturing the same

#357
20110017350
2011-01-27

Method for carburizing steel components

#358
20100323803
2010-12-23

Constant velocity universal joint component and manufacturing method thereof

#359
20100307643
2010-12-09

METHOD FOR REDUCING STRESS IN A CONDUIT BRACE ASSEMBLY

#360
20100307642
2010-12-09

Method for preparing polycrystalline structures having improved mechanical and physical properties

#361
20100252150
2010-10-07

Heat treatment method of pin for endless track

#362
20100239205
2010-09-23

Mechanical component and rolling bearing

#363
20100213648
2010-08-26

Heat treatment furnace

#364
20100154938
2010-06-24

Layered fe-based alloy and process for production thereof

#365
20100154937
2010-06-24

Carbonitriding method, machinery component fabrication method, and machinery component

#366
20100151270
2010-06-17

Process of forming nanocrystal layer

#367
20100150489
2010-06-17

Rolling member, rolling bearing and process for manufacturing rolling member

#368
20100147424
2010-06-17

ABRASION-RESISTANT STEEL EXCELLENT IN FORMABILITY AND PRODUCTION METHOD THEREOF

#369
20100139811
2010-06-10

Carbonitrided induction hardened steel part superior in surface fatigue strength at high temperature and method of production of same

#370
20100126632
2010-05-27

MANUFACTURING METHOD FOR HIGH-CONCENTRATION CARBURIZED STEEL

#371
20100084051
2010-04-08

Method for manufacturing carburized part, and steel part

#372
20100047106
2010-02-25

Forging steel

#373
20100043582
2010-02-25

Ball screw and a method for manufacturing the same

#374
20090320962
2009-12-31

CARBURIZING APPARATUS AND CARBURIZING METHOD

#375
20090309277
2009-12-17

Vacuum nitriding furnace

#376
20090301608
2009-12-10

Carburized and induction-hardened component

#377
20090276992
2009-11-12

METHOD FOR MANUFACTURING RACEWAY MEMBER, METHOD FOR MANUFACTURING VALVE TRAIN AND RACEWAY MEMBER

#378
20090189436
2009-07-30

Bearing device for wheel

#379
20090165896
2009-07-02

Carbonitriding method, machinery component fabrication method, and machinery component

#380
20090117359
2009-05-07

Carburized metal material and producing method thereof

#381
20090101240
2009-04-23

Carbonitriding method, machinery component fabrication method, and machinery component

#382
20090065098
2009-03-12

High-strength steel excellent in weldability and process for production thereof

#383
20090056404
2009-03-05

Transformable metal surface hardening method

#384
20090056399
2009-03-05

Method for executing water jet peening

#385
20090038713
2009-02-12

Rolling apparatus

#386
20080286597
2008-11-20

Process of Forming Ultrafine Crystal Layer, Machine Component Having Ultrafine Crystal Layer Formed by the Ultrafine Crystal Layer Forming Process, Process of Producing the Machine Component, Process of Forming Nanocrystal Layer, Machine Component Having Nanocrystal Layer Formed by the Nanocrystal Layer Forming Process, and Process of Producing the Machine Component

#387
20080264528
2008-10-30

ROLLING, SLIDING PART AND PROCESS FOR PRODUCING SAME

#388
20080247901
2008-10-09

Carburized and high-frequency hardened part having high strength

#389
20080156399
2008-07-03

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

#390
20070246135
2007-10-25

Method of Manufacturing a Hardened Forged Steel Component

#391
20070204466
2007-09-06

Method of forming a boss

#392
20070193660
2007-08-23

Method for carburizing steel components

#393
20070193033
2007-08-23

Method of forming a bearing device

#394
20070151634
2007-07-05

Rolling bearing

#395
20070134468
2007-06-14

Enhanced friction reducing surface and method of making the same

#396
20070116889
2007-05-24

Laser treatment of metal

#397
20070102068
2007-05-10

Heat treatment method of steel components, steel components and manufacture method of steel components

#398
20070074789
2007-04-05

Method for preparation of steel material

#399
20070069433
2007-03-29

Versatile high velocity integral vacuum furnace

#400
20070007251
2007-01-11

Method of repairing a rail

#401
20060292397
2006-12-28

Method for micromachining metallic materials

#402
20060260439
2006-11-23

Holder for a cutting tool for metalworking and a method for the production of a holder for a cutting tool

#403
20060210209
2006-09-21

Bearing assembly

#404
20060070685
2006-04-06

Thin-walled bearing component, produced without material-removing machining

#405
20060048860
2006-03-09

Machine part and method for manufacturing same

#406
20060042837
2006-03-02

Maintaining carburized case during neutral to the core heat treatment processes

#407
20060032556
2006-02-16

Case-hardened stainless steel foundry alloy and methods of making the same

#408
20050269074
2005-12-08

Case hardened stainless steel oilfield tool

#409
20050161125
2005-07-28

Alloy tool steel

#410
20050133120
2005-06-23

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

#411
20050133119
2005-06-23

Method for carburizing steel components

#412
20050081962
2005-04-21

Case hardening bearing steel having excellent toughness and rolling contact fatigue life in intermediate temperature

#413
15719868
2020-05-05

Apparatus and method for outer surface enhancement and compaction of a cylindrical structure using glass failure generated pulse

#414
14563684
2016-08-02

Breakaway vehicle fender device