ClassID:

119071

C21D9/0075 - CPC Classification

Classification description:

Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rods of limited length

Recent Application in this class:
#1
20260062775
2026-03-05

METHOD FOR PRODUCING FE-CO ALLOY ROD

#2
20250327188
2025-10-23

COMPOSITIONS AND METHODS FOR CORROSION-RESISTANT FERRITIC STAINLESS STEEL

#3
20250283188
2025-09-11

METHOD FOR QUENCHING A RACK USING A GAS FLOW

#4
20250236956
2025-07-24

APPARATUS, COMPOSITIONS, AND METHODS FOR STAINLESS-COATED STEEL REINFORCEMENT BAR

#5
20250129446
2025-04-24

ULTRA-HIGH-STRENGTH REINFORCING BAR AND MANUFACTURING METHOD THEREOF

#6
20250109465
2025-04-03

ULTRA-FINE GRAINED STEELS HAVING CORROSION-FATIGUE RESISTANCE

#7
20240209468
2024-06-27

MARTENSITIC STAINLESS STEEL MATERIAL FOR HYDROGEN GAS ENVIRONMENT AND MANUFACTURING METHOD THEREFOR

#8
20230271635
2023-08-31

RAILWAY AXLE

#9
20230012077
2023-01-12

Apparatus, compositions, and methods for stainless-coated steel reinforcement bar

#10
20230011175
2023-01-12

SYSTEMS AND METHODS FOR CORROSION RESISTANT STAINLESS STEEL COATINGS

#11
20230009856
2023-01-12

INTEGRATED HIGH THROUGHPUT COLD SPRAY COATING MANUFACTURING SYSTEM

#12
20220364194
2022-11-17

ULTRA-HIGH-STRENGTH REINFORCING BAR AND MANUFACTURING METHOD THEREOF

#13
20220307102
2022-09-29

HIGH PRODUCTIVITY PLANT FOR THE QUENCHING OF STEEL BARS, QUENCHING MACHINE AND CORRESPONDING METHOD FOR QUENCHING STEEL BARS

#14
20220220573
2022-07-14

HIGH-STRENGTH STEEL BAR AND PRODUCTION METHOD THEREOF

#15
20220195571
2022-06-23

STEEL, STEEL BAR AND MANUFACTURING METHOD THEREOF

#16
20220170125
2022-06-02

STEEL ROD

#17
20220042127
2022-02-10

Stud-weldable rebar

#18
20220026294
2022-01-27

Method of manufacturing magnetostrictive torque sensor shaft

#19
20210404033
2021-12-30

Device and method for continuous temperature gradient heat treatment of rod-shaped material

#20
20210262053
2021-08-26

High-strength and corrosion-resistant sucker rod and preparation process thereof

#21
20200370152
2020-11-26

Ultra-fine grained steels having corrosion- fatigue resistance

#22
20200283864
2020-09-10

Stud-weldable rebar

#23
20200277681
2020-09-03

700MPa CLASS STEEL BAR HAVING EXCELLENT YIELD RATIO AND UNIFORM ELONGATION PROPERTY, AND METHOD FOR MANUFACTURING THE SAME

#24
20200224288
2020-07-16

Steel wire and wire rod

#25
20200199701
2020-06-25

Methods of modifying material properties of workpieces using high-pressure-torsion apparatuses

#26
20200199700
2020-06-25

Methods of modifying material properties of workpieces using high-pressure-torsion apparatuses

#27
20200199699
2020-06-25

Methods of modifying material properties of workpieces using high-pressure-torsion apparatuses

#28
20200063247
2020-02-27

Quench and temper corrosion resistant steel alloy and method for producing the alloy

#29
20200024707
2020-01-23

Thin gauge wear-resistant steel sheet and method of manufacturing the same

#30
20190218633
2019-07-18

Case hardening steel, method of producing the same, and method of producing gear parts

#31
20190211630
2019-07-11

CORROSION RESISTANT SUCKER ROD

#32
20190169706
2019-06-06

Sucker rod steel and manufacturing method therefor

#33
20190048590
2019-02-14

Deformed reinforcing bar

#34
20190017589
2019-01-17

Drawn planetary pin assembly

#35
20180202015
2018-07-19

DEVICE FOR TREATING, BY HEAT TEMPERING, A METAL ELEMENT OF THE TUBE OR BAR TYPE HAVING ARCHED PORTIONS

#36
20180195142
2018-07-12

Method for manufacturing magnetostrictive torque sensor shaft

#37
20180105905
2018-04-19

BAINITIC STEEL FOR ROCK DRILLING COMPONENT

#38
20170349962
2017-12-07

Stabilizer

#39
20170349961
2017-12-07

Production method for stabilizers

#40
20170021691
2017-01-26

STEEL FOR VEHICLE SUSPENSION SPRING PART, VEHICLE SUSPENSION SPRING PART, AND METHOD OF FABRICATING THE SAME

#41
20170002447
2017-01-05

Quench and temper corrosion resistant steel alloy

#42
20160305192
2016-10-20

ULTRA-FINE GRAINED STEELS HAVING CORROSION-FATIGUE RESISTANCE

#43
20160186300
2016-06-30

Rolled round steel material for steering rack bar, and steering rack bar

#44
20160089766
2016-03-31

INDUCTION HARDENED PROCESSING SHAFT AND METHOD OF MAKING SAME

#45
20160023263
2016-01-28

Billet transfer line clean-out device and method

#46
20160002755
2016-01-07

High-strength steel wire material exhibiting excellent cold-drawing properties, and high-strength steel wire

#47
20150368733
2015-12-24

Method for repairing break of universal connecting rod of universal coupling

#48
20150354042
2015-12-10

Forged component, method for manufacturing the same, and connecting rod

#49
20150322554
2015-11-12

Methods for making high hardness, high toughness iron-base alloys

#50
20150247224
2015-09-03

TiC-PARTICLE-REINFORCED HIGH STRENGTH AND LOW DENSITY STEEL PRODUCTS WITH IMPROVED E-MODULUS AND METHOD FOR PRODUCING SAID PRODUCT

#51
20150247222
2015-09-03

Surface-treated component manufacturing method and apparatus

#52
20150239028
2015-08-27

High frequency induction heating apparatus and processing apparatus

#53
20150184267
2015-07-02

Method for manufacturing stabilizer, and heating device

#54
20150059933
2015-03-05

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

#55
20140322066
2014-10-30

Rolled steel bar for hot forging

#56
20140010590
2014-01-09

THERMAL TREATED REINFORCING BAR SPLICE AND METHOD

#57
20130263436
2013-10-10

Production method of seamless tube using round bar made of high Cr-high Ni alloy

#58
20130133789
2013-05-30

Steel wire and wire rod

#59
20120263622
2012-10-18

Hot-rolled steel bar or wire rod

#60
20120183430
2012-07-19

High hardness, high toughness iron-base alloys and methods for making same

#61
20120024284
2012-02-02

Device for preheating objects, particularly aluminum strands, rods, or pins, as well as a system having such a device

#62
20110290382
2011-12-01

High-strength stabilizer steel for vehicles having excellent corrosion resistance and low-temperature toughness, method of producing the same, and stabilizer

#63
20110286312
2011-11-24

Magnetically insensitive, highly hard and constant-modulus alloy, and its production method, as well as hair spring, mechanical driving apparatus and watch and clock

#64
20110220249
2011-09-15

CONTINUOUS PRODUCTION SYSTEM FOR MAGNETIC PROCESSING OF METALS AND ALLOYS TO TAILOR NEXT GENERATION MATERIALS

#65
20110171590
2011-07-14

DEVICE FOR HEATING ROD-TYPE WORK PIECES

#66
20110163512
2011-07-07

Steering tie rod end made of steel and method of manufacturing the same

#67
20100319650
2010-12-23

FUNCTIONALLY GRADED POWDER METAL COMPONENTS

#68
20100307646
2010-12-09

Cooling system and cooling method of rolling steel

#69
20100263771
2010-10-21

Steel wire rod for bearing steel, manufacturing method of steel wire rod for bearing steel, heat treatment method of steel bearing, steel bearing and soaking method of bearing steel

#70
20100252150
2010-10-07

Heat treatment method of pin for endless track

#71
20100072681
2010-03-25

METHOD AND DEVICE FOR THE INDUSTRIAL THERMAL TREATMENT OF ELONGATED MECHANICAL PARTS

#72
20090277539
2009-11-12

Steel for Warm Working, Warm Working Method Using the Steel, and Steel Material and Steel Component Obtainable Therefrom

#73
20090158587
2009-06-25

HEAT-BASED REDIMENSIONING FOR REMANUFACTURE OF FERROUS COMPONENTS

#74
20090155118
2009-06-18

High Strength Steel

#75
20090126834
2009-05-21

Spring steel and spring superior in fatigue properties

#76
20090090436
2009-04-09

Method for brake rotor assembly and manufacture

#77
20090047169
2009-02-19

ROLLED MATERIAL FOR FRACTURE SPLIT CONNECTING ROD EXCELLING IN FRACTURE SPLITTABILITY, HOT FORGED PART FOR FRACTURE SPLIT CONNECTING ROD EXCELLING IN FRACTURE SPLITTABILITY, AND FRACTURE SPLIT CONNECTING ROD

#78
20090044884
2009-02-19

Treatment Process for Bars

#79
20090013831
2009-01-15

Elongated percussive rock drilling element, a method for production thereof and a use thereof

#80
20080264529
2008-10-30

Apparatus and Method for Continuously Processing Long Bar by Heat Treatment Using Induction Heating

#81
20080257460
2008-10-23

Method of producing forgings having excellent tensile strength and elongation from steel wire rods

#82
20080242438
2008-10-02

Golf shaft, golf club, and production method for golf shaft

#83
20080237943
2008-10-02

Arrangement and a Method For Heating Metal Objects

#84
20080110227
2008-05-15

Method of working metal, metal body obtained by the method and metal-containing ceramic body obtained by the method

#85
20080110226
2008-05-15

Method of working metal, metal body obtained by the method and metal-containing ceramic body obtained by the method

#86
20060260378
2006-11-23

Method of working metal, metal body obtained by the method and metal-containing ceramic body obtained by the method

#87
20060188384
2006-08-24

High strength steel

#88
20060054255
2006-03-16

Controlled warm-rolling method

#89
20050214157
2005-09-29

High strength steel