ClassID:

118859

C21C5/5264 - CPC Classification

Classification description:

Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel; Manufacture of steel in electric furnaces Manufacture of alloyed steels including ferro-alloys

Recent Application in this class:
#1
20260117332
2026-04-30

METHOD OF SMELTING STEEL AND METHOD OF PRODUCING STEEL

#2
20250320570
2025-10-16

METHOD AND APPARATUS FOR METALS, ALLOYS, MATTES, OR ENRICHED AND CLEANED SLAGS PRODUCTION FROM PREDOMINANTLY OXIDE FEEDS

#3
20250179598
2025-06-05

METHOD FOR RECYCLING CHROMIUM OXIDE AND FORMING CHROMIUM-ALLOY STEEL

#4
20250083218
2025-03-13

Process for producing clean steel products with a low nitrogen content using an electric arc furnace and a degassing system

#5
20250043374
2025-02-06

SEAWATER CORROSION-RESISTANT MARINE ENGINEERING STEEL AND PREPARATION METHOD THEREOF

#6
20240279079
2024-08-22

System and method to sustainable integrated wastewater treatment and air-cooling in a steelmaking plant

#7
20240026476
2024-01-25

METHOD AND APPARATUS FOR METALS, ALLOYS, MATTES, OR ENRICHED AND CLEANED SLAGS PRODUCTION FROM PREDOMINANTLY OXIDE FEEDS

#8
20220389529
2022-12-08

DIRECT CURRENT ELECTRIC ARC FURNACE

#9
20220170124
2022-06-02

Method for recycling chromium oxide and forming chromium-alloy steel

#10
20210262068
2021-08-26

Alloy steel manufacturing method

#11
20200377977
2020-12-03

METHOD FOR PRODUCING ALLOY STEEL

#12
20200354811
2020-11-12

Processing method

#13
20200291497
2020-09-17

METHOD OF MAKING STAINLESS STEEL

#14
20190161839
2019-05-30

Rail

#15
20190048430
2019-02-14

Clean and rapid smelting method in an electric arc furnace with full scrap steel

#16
20180371562
2018-12-27

METHOD FOR PRODUCTION OF IRON-SILICON-ALUMINUM ALLOYS AND THEIR USE

#17
20170307294
2017-10-26

METHOD FOR CASTING IRON OR STEEL, A CHARGE FOR USE IN THE METHOD, AND A METHOD FOR PRODUCING A CHARGE

#18
20160333430
2016-11-17

Method for making steel in an electric arc furnace and electric arc furnace

#19
20150240321
2015-08-27

Advanced technology for iron-chrome alloys production and related plant

#20
20150013496
2015-01-15

Metallurgical composition for the manufacture of ferrochrome

#21
20140352494
2014-12-04

Methods and systems for producing ferro-chrome in a duplex furnace

#22
20130213184
2013-08-22

Process for making low and specified hardenability structural steel

#23
20130025413
2013-01-31

Method for treatment of chrome-containing molten iron and slag

#24
20130000446
2013-01-03

METHOD FOR PRODUCING FOAMED SLAG ON HIGH-CHROMIUM MELTS IN AN ELECTRIC FURNACE

#25
20120138253
2012-06-07

ADVANCED TECHNOLOGY FOR IRON-CHROME ALLOYS PRODUCTION AND RELATED PLANT

#26
20120036960
2012-02-16

Direct processing of metallic ore concentrates into ferroalloys

#27
20110265608
2011-11-03

Process for production of ultra low phosphorous and carbon ferromanganese by using of ferromanganese slag

#28
20110252967
2011-10-20

Method and arrangement for removing solid particles and tar component from carbon monoxide gas

#29
20110197713
2011-08-18

RECARBURISATION METHOD

#30
20110146447
2011-06-23

Method for controlling foamed slag in a stainless melt in an electronic arc furnace

#31
20110094336
2011-04-28

Method for producing a steel melt containing up to 30% manganese

#32
20100150771
2010-06-17

AUSTENITIC SERIES STAINLESS STEEL AND RELEVANT CASTING METHOD

#33
20100147108
2010-06-17

Production of ferro-alloys

#34
20100126309
2010-05-27

Method for recovering molybdenium, nickel, cobalt or their mixtures from used or regenerated catalysts

#35
20100089202
2010-04-15

Method for the reduction of a slag having a high degree of chromium in an electric arc furnace

#36
20100000062
2010-01-07

Method and installation for producing steel products with optimum surface quality

#37
20090173187
2009-07-09

Manufacture of Ferroalloys

#38
20090022617
2009-01-22

Low-nickel austenitic stainless steel and method for producing same

#39
20080250899
2008-10-16

Processing metallurgical slag

#40
20080156144
2008-07-03

METHOD FOR REDUCING TO METALLIC CHROMIUM THE CHROMIUM OXIDE IN SLAG FROM STAINLESS STEEL PROCESSING

#41
20080092692
2008-04-24

Production of ferro-alloys

#42
20070272054
2007-11-29

Method and installation for the production of steel products having an optimum surface quality

#43
20070113708
2007-05-24

FERRONICKEL AND PROCESS FOR PRODUCING RAW MATERIAL FOR FERRONICKEL SMELTING

#44
20070079667
2007-04-12

METHOD OF PRODUCING STAINLESS STEEL BY RE-USING WASTE MATERIAL OF STAINLESS STEEL PRODUCING PROCESS

#45
20060292027
2006-12-28

High-purity ferroboron, a mother alloy for iron-base amorphous alloy, an iron-base amorphous alloy, and methods for producing the same

#46
20060278042
2006-12-14

Method of producing stainless steel by re-using waste material of stainless steel producing process

#47
20060260435
2006-11-23

Method for producing foamed slag on high-chromium melts in an electric furnace

#48
20060196308
2006-09-07

Method for recovering metallic elements, especially metallic chromium, from slag containing metal oxides in an electric-arc furnace

#49
20060037673
2006-02-23

Chromium-containing metal and manufacturing method thereof

#50
20050211020
2005-09-29

Ferronickel and process for producing raw material for ferronickel smelting

#51
20050061109
2005-03-24

Method for production of metallic elements of high purity such as chromes