C21C7/04 - CPC Classification Index

ClassID:

118886 ⎘

C21C7/04 - CPC Classification

Classification description:

Treating molten ferrous alloys, e.g. steel, not covered by groups - Removing impurities by adding a treating agent

Sub-classes:

C21C7/06 » Deoxidising, e.g. killing 118
C21C7/064 » Dephosphorising; Desulfurising 75
C21C7/068 » Decarburising 59
C21C7/072 » Treatment with gases 85
C21C7/076 » Use of slags or fluxes as treating agents 77

Recent Application in this class:

20240247329

2024-07-25

Molten steel denitrification method and steel production method

20240035104

2024-02-01

CONVERTER BLOWING CONTROL METHOD AND CONVERTER BLOWING CONTROL SYSTEM

20230295780

2023-09-21

Ultra-clean rare earth steel and occluded foreign substance modification control method

20220259707

2022-08-18

ULTRA-CLEAN RARE EARTH STEEL AND OCCLUDED FOREIGN SUBSTANCE MODIFICATION CONTROL METHOD

20210123112

2021-04-29

Cored wire with particulate material

20200318209

2020-10-08

METHOD FOR ELUTING CALCIUM FROM STEELMAKING SLAG, AND METHOD FOR COLLECTING CALCIUM FROM STEELMAKING SLAG

20200056271

2020-02-20

Non-heat treated steel bar

20190218632

2019-07-18

BLOCKING MATERIAL AND METHOD FOR MANUFACTURING ALLOY STEEL

20190169723

2019-06-06

Steel for Machine Structural Use

#10

20190144960

2019-05-16

Cored wire with particulate material

#11

20190048431

2019-02-14

Method for refining molten steel in vacuum degassing equipment

#12

20180230580

2018-08-16

Stainless steel product

#13

20170159140

2017-06-08

Production method for maraging steel and production method for maraging steel consumable electrode

#14

20170044633

2017-02-16

Spring steel and method for producing the same

#15

20160203895

2016-07-14

Non-oriented electrical steel sheet and hot rolled steel sheet thereof

#16

20160145718

2016-05-26

Method of producing steel material

#17

20160130674

2016-05-12

Si-killed steel wire rod and spring

#18

20160053352

2016-02-25

Low-oxygen clean steel and low-oxygen clean steel product

#19

20150204071

2015-07-23

H-Section steel

#20

20140241934

2014-08-28

Steel sheet

#21

20140170712

2014-06-19

Mashing process

#22

20140069235

2014-03-13

Method of refining molten iron

#23

20120304820

2012-12-06

Process for Producing a High-Cleanliness Steel

#24

20120055874

2012-03-08

Method and device for contacting two immiscible liquids without mixing them

#25

20110209581

2011-09-01

Method of producing steel for steel pipe excellent in sour-resistance performance

#26

20110017018

2011-01-27

Additive for treating resulphurized steel

#27

20100180726

2010-07-22

Anti-oxidative agent for molten metal, method of preparing and method of using thereof

#28

20100150771

2010-06-17

AUSTENITIC SERIES STAINLESS STEEL AND RELEVANT CASTING METHOD

#29

20100071509

2010-03-25

Method of producing steel for steel pipe excellent in sour-resistance performance

#30

20100024923

2010-02-04

Si-killed steel wire rod and spring

#31

20090269818

2009-10-29

Mashing process

#32

20090047168

2009-02-19

Continuously Cast Enameled Steel Sheet Remarkably Excellent in Fishscale Resistance and Method of Production of the Same

#33

20090019968

2009-01-22

Removal method of nitrogen in molten steel

#34

20080257106

2008-10-23

Process for Producing a High-Cleanliness Steel

#35

20080202289

2008-08-28

Method for producing high cleanness steel excellent in fatigue strength or cold workability

#36

20080025865

2008-01-31

Process for producing a high-cleanliness steel

#37

20080006349

2008-01-10

Cast iron alloy containing boron

#38

20070193412

2007-08-23

Method of making steel

#39

20070148741

2007-06-28

Mashing process

#40

20070012383

2007-01-18

Method for manufacturing a low alloy steel excellent in corrosion resistance

#41

20060292026

2006-12-28

Cast iron alloy containing boron

#42

20060289095

2006-12-28

Nitrogen removal from molten metal by slags containing titanium oxides

#43

20060156864

2006-07-20

Method for producing high cleanliness steel excellent in fatigue strength or cold workability

#44

20060096416

2006-05-11

Refining agent and refining method

#45

20050257644

2005-11-24

Refining agent and refining method

#46

20050011309

2005-01-20

Agglomerated quicklime or dolomitic quicklime compositions for electric arc furnace steelmaking

#47

16293182

2019-12-03

Method of renovating and afforesting slag mountain with humic acid substance