ClassID:

119927

C23C8/26 - page 2 - CPC Classification

Classification description:

Solid state diffusion of only non-metal elements into metallic material surfaces ; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied; Nitriding of ferrous surfaces

Recent Application in this class:
#301
20130299047
2013-11-14

SURFACE TREATMENT OF METAL OBJECTS

#302
20130297006
2013-11-07

Implant with increased carbon content at near-surface boundary layer

#303
20130273393
2013-10-17

Steel for cold forging/nitriding, steel material for cold forging/nitriding, and cold-forged/nitrided component

#304
20130220489
2013-08-29

Steel for machine structure use for surface hardening and steel part for machine structure use

#305
20130213527
2013-08-22

High-strength transmission gear and method of manufacturing the same

#306
20130126048
2013-05-23

Nitrogen alloyed martensitic stainless steel and process

#307
20130081740
2013-04-04

Composition design and processing methods of high strength, high ductility, and high corrosion resistance FeMnAlC alloys

#308
20130068349
2013-03-21

HIGH-STRENGTH TRANSMISSION GEAR AND METHOD OF MANUFACTURING THE SAME

#309
20130049304
2013-02-28

Nitrided piston ring resistant to the propagation of cracks

#310
20130042992
2013-02-21

METHOD FOR SURFACE TREATMENT OF A DIE-CASTING DIE

#311
20130004883
2013-01-03

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

#312
20120325373
2012-12-27

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

#313
20120318407
2012-12-20

Spring steel and surface treatment method for steel material

#314
20120305139
2012-12-06

PROCESS FOR COATING STEEL STRIPS AND COATED STEEL STRIP

#315
20120298262
2012-11-29

High strength steel and high strength bolt excellent in delayed fracture resistance and methods of production of same

#316
20120291923
2012-11-22

Method of manufacturing a laminar ring

#317
20120247618
2012-10-04

HIGH STRENGTH STEEL MATERIAL AND HIGH STRENGTH BOLT EXCELLENT IN DELAYED FRACTURE RESISTANCE AND METHODS OF PRODUCTION OF SAME

#318
20120241050
2012-09-27

NITRIDING PROCESS FOR MARAGING STEEL

#319
20120219409
2012-08-30

Pump used in gasification system

#320
20120186703
2012-07-26

NITRIDING OF NIOBIUM STEEL AND PRODUCT MADE THEREBY

#321
20120168033
2012-07-05

Method and device for hardening work pieces and workpieces hardened according to said method

#322
20120139160
2012-06-07

Low CTE slush molds with textured surface, and method of making and using the same

#323
20120118435
2012-05-17

Method and apparatus for nitriding metal articles

#324
20120118434
2012-05-17

STEEL MEMBER HAVING NITROGEN COMPOUND LAYER AND PROCESS FOR PRODUCING SAME

#325
20120111456
2012-05-10

Method of activating an article of passive ferrous or non-ferrous metal prior to carburising, nitriding and /or nitrocarburising

#326
20120111455
2012-05-10

Manufacturing method of grain-oriented magnetic steel sheet

#327
20120103474
2012-05-03

Manufacturing method of grain-oriented electrical steel sheet

#328
20120082586
2012-04-05

Nitrogen alloyed stainless steel and process

#329
20120080122
2012-04-05

Steel for nitriding use and nitrided part

#330
20120073568
2012-03-29

METHODS FOR IN SITU DEPOSITION OF COATINGS AND ARTICLES PRODUCED USING SAME

#331
20120048427
2012-03-01

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

#332
20120037277
2012-02-16

Method of treating steel for grain-oriented electrical steel sheet and method of manufacturing grain-oriented electrical steel sheet

#333
20120031529
2012-02-09

Maraging steel strip

#334
20120014635
2012-01-19

Mechanical component and rolling bearing

#335
20110315275
2011-12-29

Method of treating parts for kitchen utensils

#336
20110277886
2011-11-17

NITRIDING OF NIOBIUM STEEL AND PRODUCT MADE THEREBY

#337
20110274578
2011-11-10

Steel for surface hardening for machine structural use and part for machine structural use

#338
20110236592
2011-09-29

METHOD FOR TREATING A METAL ELEMENT WITH ION BEAM

#339
20110209798
2011-09-01

Grain-oriented electrical steel sheet and manufacturing method thereof

#340
20110155285
2011-06-30

Manufacturing method of grain-oriented electrical steel sheet

#341
20110114045
2011-05-19

Sliding member and surface treatment method for the same

#342
20110077732
2011-03-31

Implant and method for manufacturing same

#343
20110041959
2011-02-24

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

#344
20100319647
2010-12-23

COMBINATION STRUCTURE OF PISTON RING AND CYLINDER LINER FOR INTERNAL COMBUSTION ENGINE

#345
20100314005
2010-12-16

HIGHLY CORROSION-RESISTANT MEMBER AND MANUFACTURING PROCESS FOR THE SAME

#346
20100294078
2010-11-25

Engine starter

#347
20100239205
2010-09-23

Mechanical component and rolling bearing

#348
20100175269
2010-07-15

Dining and/or serving cutlery made of ferritic stainless steel with a martensitic boundary layer

#349
20100154938
2010-06-24

Layered fe-based alloy and process for production thereof

#350
20100081292
2010-04-01

Gas treatment method and computer readable storage medium

#351
20100058592
2010-03-11

Method for hardening running surfaces of roller bearing components

#352
20100037991
2010-02-18

DIFFUSION PROMOTERS FOR LOW TEMPERATURE CASE HARDENING

#353
20100025500
2010-02-04

Materials for fuel injector components

#354
20100021796
2010-01-28

Transition metal nitride, separator for fuel cells, fuel cell stack, fuel cell vehicle, method of manufacturing transition metal nitride, and method of manufacturing separator for fuel cells

#355
20100009795
2010-01-14

Pulley for continuously variable transmission

#356
20090269649
2009-10-29

Stainless separator for fuel cell and method of manufacturing the same

#357
20090246551
2009-10-01

Method of plasma nitriding of alloys via nitrogen charging

#358
20090218011
2009-09-03

Method for manufacturing a stainless steel product

#359
20090194203
2009-08-06

METHOD OF MANUFACTURING A BLADE WITH HIGH HARDNESS NITRIDE LAYER

#360
20090174129
2009-07-09

High-strength stainless steel spring and method of manufacturing the same

#361
20090145263
2009-06-11

Engine starter

#362
20090126832
2009-05-21

Method of production of grain-oriented electrical steel sheet having a high magnetic flux density

#363
20090065098
2009-03-12

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

#364
20090056835
2009-03-05

Pair of guiding elements of which one is made of specific steel leading to improved anti-seizing performances

#365
20090047528
2009-02-19

SURFACE TREATMENT METHOD OF ALUMINUM EXTRUDING DIE, AND ALUMINUM EXTRUDING DIE

#366
20090038713
2009-02-12

Rolling apparatus

#367
20090032142
2009-02-05

Method of producing grain-oriented electrical steel sheet very excellent in magnetic properties

#368
20080220236
2008-09-11

Soft magnetic materials

#369
20080216923
2008-09-11

WEAR-RESISTANT ELEMENTS AND METHOD OF MAKING SAME

#370
20080145690
2008-06-19

Gear material for an enhanced rotorcraft drive system

#371
20080066703
2008-03-20

Nitrided valve lifter

#372
20080057357
2008-03-06

TRANSITION METAL NITRIDE, FUEL CELL SEPARATOR, METHOD FOR PRODUCING TRANSITION METAL NITRIDE, METHOD FOR PRODUCING FUEL CELL SEPARATOR, FUEL CELL STACK AND FUEL CELL VEHICLE

#373
20080050635
2008-02-28

Separator for fuel cell with austenitic stainless steel substrate

#374
20080047632
2008-02-28

Method for Thermally Treating a Component Consisting of a Fully Hardenable, Heat-Resistant Steel and a Component Consisting of Said Steel

#375
20080000553
2008-01-03

Soft-nitrided parts made of non-heat treated steel

#376
20070217293
2007-09-20

Decorative product and timepiece

#377
20070187002
2007-08-16

Piston ring having improved scuffing, cracking and fatigue resistances, and its production method, as well as combination of piston ring and cylinder block

#378
20070186999
2007-08-16

Method for manufacturing a stainless steel product and a stainless steel product manufactured by the method

#379
20070169850
2007-07-26

Rolling bearing and heat treatment method for steel

#380
20070163676
2007-07-19

Method for reducing reactivity of ferroalloys used in fabricating coated stick welding electrodes

#381
20070151633
2007-07-05

Rolling bearing

#382
20070119519
2007-05-31

Method of production of steel soft nitrided machine part

#383
20070110610
2007-05-17

Hot work tool steel and mold member excellent resistance to melting loss

#384
20070098977
2007-05-03

Soft magnetic materials and methods of making

#385
20070071630
2007-03-29

Wear-resistant elements and method of making same

#386
20070047862
2007-03-01

Drawn cup needle roller bearing

#387
20060204818
2006-09-14

Transition metal nitride and fuel cell applications

#388
20060204155
2006-09-14

Rolling bearing

#389
20060201001
2006-09-14

Coated cutting member having a nitride hardened substrate

#390
20060192347
2006-08-31

Nitrided material for MLS active layers

#391
20060147296
2006-07-06

Screw or tapping screw

#392
20060144359
2006-07-06

Nitrided valve lifter and producing method therefor

#393
20060130934
2006-06-22

Medical instrument for soft tissue and method for manufacture thereof

#394
20060104850
2006-05-18

Ultra-low carbon stainless steel

#395
20060102253
2006-05-18

Surface modified stainless steel

#396
20060090817
2006-05-04

Case-hardening of stainless steel

#397
20060070685
2006-04-06

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

#398
20060061043
2006-03-23

Three piece-combined oil ring

#399
20060057419
2006-03-16

High-strength steel product excelling in fatigue strength and process for producing the same

#400
20060048866
2006-03-09

High strength high toughness Mo alloy worked material and method for production thereof

#401
20060048860
2006-03-09

Machine part and method for manufacturing same

#402
20060037669
2006-02-23

Method for manufacturing stainless steel product by nitrogen absorption treatment and stainless steel product produced by the method

#403
20060026829
2006-02-09

Process for producing a thermally coated cylinder bearing surface having an insertion bevel

#404
20060016519
2006-01-26

Rolling element

#405
20060000302
2006-01-05

Seal for worm gear speed reducer

#406
20050279426
2005-12-22

Method of plasma nitriding of metals via nitrogen charging

#407
20050247375
2005-11-10

Method of nitriding metal ring and apparatus therefor

#408
20050241733
2005-11-03

Superfine grain steel having nitrided layer

#409
20050238873
2005-10-27

Surface modified stainless steels for PEM fuel cell bipolar plates

#410
20050109428
2005-05-26

Transmission chain

#411
20050063852
2005-03-24

Screw compressor and method of manufacturing rotor for the same

#412
20050051240
2005-03-10

Rolling element and method of producing the same

#413
20050022906
2005-02-03

Bainite type non-refined steel for nitriding, method for production thereof and nitrided product

#414
20050006006
2005-01-13

High temperature alloy particularly suitable for a long-life turbocharger nozzle ring

#415
18077502
2023-09-19

Surface treatment for a wellbore drill bit

#416
15963577
2019-04-30

Brake disk and manufacturing method thereof

#417
15923248
2019-06-04

Metal block for fluid transportation

#418
15356695
2019-07-23

Mechanical processing of metallic component surfaces