ClassID:

119923

C23C8/18 - 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; Oxidising using oxygen-containing compounds, e.g. water, carbon dioxide Oxidising of ferrous surfaces

Recent Application in this class:
#1
20260152838
2026-06-04

OXIDIZED AND BORONIZED LAYERS FOR CORROSION RESISTANCE

#2
20250250659
2025-08-07

CAM RING AND PLATE MODULE FOR VEHICLE VACUUM PUMPS, AND METHOD OF MANUFACTURING THE SAME

#3
20250122601
2025-04-17

Cam ring and plate module for vehicle vacuum pumps, and method of manufacturing the same

#4
20250019816
2025-01-16

Anti-Coking Iron Spinel Surface

#5
20240392422
2024-11-28

BEARING STEEL WITH IMPROVED INSULATION PERFORMANCE

#6
20240213862
2024-06-27

HEAT TREATMENT FURNACE AND HEAT TREATMENT METHOD

#7
20240102124
2024-03-28

High-resistance steel strip comprising a temperature homogenisation chamber

#8
20230392249
2023-12-07

Manufacturing method for alloy material, alloy material, electrochemical element, electrochemical module, electrochemical device, energy system and solid oxide fuel cell

#9
20230332657
2023-10-19

System and method of making an enhanced brake rotor with improved corrosion resistance

#10
20220220999
2022-07-14

Guiding member, mechanical system comprising such a guiding member, and method for producing such a guiding member

#11
20220162735
2022-05-26

STABLE MANGANOCHROMITE SPINEL ON STAINLESS STEEL SURFACE

#12
20220119933
2022-04-21

Anti-coking iron spinel surface

#13
20220093296
2022-03-24

Preservation of strain in iron nitride magnet

#14
20210317542
2021-10-14

Base sheet for grain-oriented electrical steel sheet, grain-oriented silicon steel sheet which is used as material of base sheet for grain-oriented electrical steel sheet, method of manufacturing base sheet for grain-oriented electrical steel sheet, and method of manufacturing grain-oriented electrical steel sheet

#15
20210214831
2021-07-15

Protective surface on stainless steel

#16
20210062314
2021-03-04

AUSTENITIC HEAT RESISTANT ALLOY

#17
20210010125
2021-01-14

Method for forming a layer of single-phase oxide (Fe, Cr)Owith a rhombohedral structure on a steel or super alloy substrate

#18
20200224302
2020-07-16

Method for manufacturing soft magnetic member

#19
20200102635
2020-04-02

Manufacturing method for alloy material, alloy material, electrochemical element, electrochemical module, electrochemical device, energy system and solid oxide fuel cell

#20
20200057038
2020-02-20

Method for evaluating the quality of steam-treated products

#21
20190330724
2019-10-31

Heat Resistant Ferritic Steel and Ferritic Heat Transfer Member

#22
20190242002
2019-08-08

Manufacture of a stress relieved length of steel having an oxidised surface layer

#23
20190136361
2019-05-09

Cast product having alumina barrier layer

#24
20190100833
2019-04-04

Protective surface on stainless steel

#25
20180375087
2018-12-27

Process of preparing a chemically pre-formed (CPF) iron negative electrode with oxidizing gases

#26
20180371602
2018-12-27

Process of preparing a chemically pre-formed (CPF) iron negative electrode with water

#27
20180265953
2018-09-20

STAINLESS STEEL FOR COMPOUND THIN FILM SOLAR CELL SUBSTRATES, METHOD FOR PRODUCING SAME, AND COMPOUND THIN FILM SOLAR CELL

#28
20180251882
2018-09-06

Anti-coking iron spinel surface

#29
20180166661
2018-06-14

Battery armoring stainless steel foil, and method of producing same

#30
20180010228
2018-01-11

Process of preparing a chemically pre-formed (CPF) iron negative electrode with water

#31
20180010206
2018-01-11

Grain-oriented electrical steel plate and production method therefor

#32
20170369960
2017-12-28

Grain-oriented electrical steel plate and manufacturing method thereof

#33
20170365381
2017-12-21

Preservation of strain in iron nitride magnet

#34
20170218496
2017-08-03

Heat resistant ferritic steel and method for producing the same

#35
20170162857
2017-06-08

Process of preparing a chemically pre-formed (CPF) iron negative electrode with oxidizing gases

#36
20170030408
2017-02-02

Multi-layer sliding bearing

#37
20160379754
2016-12-29

METHOD FOR PRODUCING A FERROMAGNETIC COMPONENT FOR A TORQUE SENSOR OF A VEHICLE STEERING SHAFT, AND TORQUE SENSOR

#38
20160363349
2016-12-15

METHOD FOR PRODUCING AN ELEMENT FOR ABSORBING SOLAR RADIATION FOR A CONCENTRATING SOLAR THERMAL POWER PLANT, ELEMENT FOR ABSORBING SOLAR RADIATION

#39
20160339545
2016-11-24

Steam oxidation of thermal spray substrate

#40
20160304980
2016-10-20

Method of annealing steel sheets

#41
20160160335
2016-06-09

HIGH-STRENGTH PLATED STEEL SHEET HAVING SUPERIOR PLATING PROPERTIES, WORKABILITY, AND DELAYED FRACTURE RESISTANCE, AND METHOD FOR PRODUCING SAME

#42
20160160328
2016-06-09

Ferritic stainless steel foil

#43
20160138516
2016-05-19

METHOD FOR PRODUCING AN OXIDATION PROTECTION LAYER FOR A PISTON FOR USE IN INTERNAL COMBUSTION ENGINES AND PISTON HAVING AN OXIDATION PROTECTION LAYER

#44
20160079455
2016-03-17

Stainless steel substrate for solar cell having superior insulating properties and low thermal expansion coefficient and method of producing the same

#45
20160035469
2016-02-04

Non-oriented electrical steel sheet and manufacturing method thereof

#46
20160010166
2016-01-14

Roughly shaped material for induction hardened components and method for producing same

#47
20150322560
2015-11-12

Cr-containing austenitic alloy and method for producing the same

#48
20150107722
2015-04-23

Method for producing black-plated steel sheet, and method for producing molded article of black-plated steel sheet

#49
20150083276
2015-03-26

Method for producing black-plated steel sheet, and method for producing molded article of black-plated steel sheet

#50
20150064454
2015-03-05

Chromium-containing austenitic alloy

#51
20150060739
2015-03-05

Process of preparing a chemically pre-formed (CPF) iron negative electrode with water

#52
20150059931
2015-03-05

Process of preparing a chemically pre-formed (CPF) iron negative electrode with oxidizing gases

#53
20140295194
2014-10-02

Heat resistant ferritic steel and method for producing the same

#54
20140090639
2014-04-03

Process for producing an element for absorbing solar radiation for a thermal concentrating solar power plant

#55
20130295411
2013-11-07

Hot-dip Al—Zn coated steel sheet

#56
20130285512
2013-10-31

Piezoelectric element

#57
20130206272
2013-08-15

Cr-containing austenitic alloy tube and method for producing the same

#58
20130000789
2013-01-03

Method for manufacturing steel plate with a layered structure

#59
20120325375
2012-12-27

Steel Sheet Manufactured by Decarburizing Solid Sponge Iron and Method for Manufacturing the Same

#60
20120308772
2012-12-06

STEAM TURBINE MEMBER

#61
20120305140
2012-12-06

Non-oriented electrical steel sheet and manufacturing method thereof

#62
20120073568
2012-03-29

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

#63
20120064242
2012-03-15

Method for monitoring corrosion protection in power plant

#64
20110030852
2011-02-10

Method for producing pieces having a modified surface

#65
20090139397
2009-06-04

Method of manufacturing bellows

#66
20090035523
2009-02-05

Surface-modified member, surface-treating process and apparatus therefor

#67
20060193940
2006-08-31

Resin molding machine and member for resin molding machine having film in passive state

#68
20060191600
2006-08-31

Steel and component of structural equipment for use in a hydrogen gas environment, and a method for the manufacture thereof

#69
20060188056
2006-08-24

Method for forming coatings on structural components with corrosion-mitigating materials

#70
20060118216
2006-06-08

Method for producing pieces having a modified surface

#71
20060086431
2006-04-27

Surface on a stainless steel matrix

#72
20050257857
2005-11-24

Surface on a stainless steel matrix

#73
20050077210
2005-04-14

Thermal cracking process using tubes, pipes, and coils made of novel stainless steel matrix

#74
20050045250
2005-03-03

Oxidation resistant ferritic stainless steels

#75
20050028891
2005-02-10

Method for producing and oxide layer on metallic elements