ClassID:

118941

C21D1/56 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering characterised by the quenching agents

Sub-classes:
Recent Application in this class:
#1
20260085371
2026-03-26

HEAT TREATED COILED TUBING

#2
20250003038
2025-01-02

COLD FORGING WIRE ROD AND STEEL PART HAVING IMPROVED DELAYED FRACTURE RESISTANCE, AND METHOD FOR MANUFACTURING SAME

#3
20230183831
2023-06-15

Multi-thickness welded vehicle structure

#4
20210238701
2021-08-05

Method for heat treating a horological component

#5
20200282454
2020-09-10

Method of a heat transfer of a non-metallic or metallic item

#6
20190106762
2019-04-11

Rail manufacturing method and manufacturing equipment

#7
20190002750
2019-01-03

Method of heat transfer between a metallic or non-metallic item and a heat transfer fluid

#8
20190002749
2019-01-03

Method of heat transfer between a metallic or non-metallic item and a heat transfer fluid

#9
20180371587
2018-12-27

Thick steel plate for high heat input welding and having great heat-affected area toughness and manufacturing method therefor

#10
20180371304
2018-12-27

Method of a heat transfer of a non-metallic or metallic item

#11
20180363091
2018-12-20

Thick steel plate for high heat input welding and having great heat-affected area toughness and manufacturing method therefor

#12
20180347022
2018-12-06

Method for producing 7000-series aluminum alloy member excellent in stress corrosion cracking resistance

#13
20170314088
2017-11-02

Zinc-coated hot formed steel component with tailored property

#14
20170081737
2017-03-23

COOLING APPARATUS AND MULTI-CHAMBER HEAT TREATMENT APPARATUS

#15
20170037592
2017-02-09

Integrally cast excavator bucket and manufacturing method thereof

#16
20170014901
2017-01-19

Wear Part with Hardfacing and Method of Making Same

#17
20160369370
2016-12-22

BEARING STEEL HAVING IMPROVED FATIGUE DURABILITY AND METHOD OF MANUFACTURING THE SAME

#18
20160333523
2016-11-17

Creping blade and method for its manufacturing

#19
20160312328
2016-10-27

Multi-track laser surface hardening of low carbon cold rolled closely annealed (CRCA) grades of steels

#20
20160305194
2016-10-20

Heat treated heavy weight drill pipe

#21
20160281188
2016-09-29

HEAT TREATED COILED TUBING

#22
20160258035
2016-09-08

Method for producing a hot-formed and quench-hardened motor vehicle component formed by internal high-pressure forming

#23
20160237540
2016-08-18

METHOD FOR PRODUCING 7000-SERIES ALUMINUM ALLOY MEMBER EXCELLENT IN STRESS CORROSION CRACKING RESISTANCE

#24
20160237516
2016-08-18

Apparatus for quenching

#25
20160186302
2016-06-30

HIGH-STRENGTH ALUMINUM ALLOY AND MANUFACTURING METHOD THEREOF

#26
20160160307
2016-06-09

Low alloy oil well steel pipe and method for manufacturing same

#27
20160130679
2016-05-12

Post Machining Multi-Step Material Working Treatment of Fluid End Housing

#28
20160074936
2016-03-17

Permanent magnet source powder fabrication method, permanent magnet fabrication method, and permanent magnet raw material powder inspection method

#29
20160040263
2016-02-11

Rail manufacturing method and manufacturing equipment

#30
20150322554
2015-11-12

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

#31
20150226014
2015-08-13

Ultra-high toughness and high strength drill pipe and manufacturing process thereof

#32
20150164633
2015-06-18

Method of making an endoprosthesis containing multi-phase stainless steel

#33
20140261926
2014-09-18

Synthetic quenching fluid composition

#34
20140246132
2014-09-04

Aqueous quenching media and use thereof in quenching metal substrates

#35
20120312159
2012-12-13

MACHINE COMPONENT WITH A CAVITATION RESISTANT COVERING

#36
20120186705
2012-07-26

Method and device for producing a metal component

#37
20120186320
2012-07-26

METHOD AND MACHINE TOOL FOR THE PROCESSING AND HARDENING OF METALLIC WORKPIECES

#38
20120183430
2012-07-19

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

#39
20110288630
2011-11-24

Endoprosthesis containing multi-phase ferrous steel

#40
20110186188
2011-08-04

Method for producing steel pipe with excellent expandability

#41
20110094700
2011-04-28

Process for continuous production of ductile microwires from glass forming systems

#42
20110094638
2011-04-28

Aqueous quenching media and use thereof in quenching metal substrates

#43
20100236669
2010-09-23

Method for the heat treatment of castings using an air quench and system for implementing the method

#44
20100163138
2010-07-01

METHOD FOR QUENCHING OF STEEL MEMBER, QUENCHED STEEL MEMBER, AND AGENT FOR PROTECTING QUENCHED SURFACE

#45
20100139811
2010-06-10

Carbonitrided induction hardened steel part superior in surface fatigue strength at high temperature and method of production of same

#46
20100065992
2010-03-18

System and method for annealing nuclear fission reactor materials

#47
20100065169
2010-03-18

Metal quenching medium

#48
20100065166
2010-03-18

STEEL PIPE WITH EXCELLENT EXPANDABILITY AND METHOD FOR PRODUCING THE SAME

#49
20100037992
2010-02-18

Method for transforming steel blanks

#50
20090288743
2009-11-26

Method for quenching steel

#51
20090126838
2009-05-21

Uniform heat treatment process for hardening steel

#52
20090095384
2009-04-16

AQUEOUS QUENCHING MEDIA AND USE THEREOF IN QUENCHING METAL SUBSTRATES

#53
20090065108
2009-03-12

Integrated Reformer and Batch Annealing Processes and Apparatus Therefor

#54
20090065107
2009-03-12

Polymeric quenchant, manufacture thereof, and method for quenching steel

#55
20080053579
2008-03-06

Method of Making High Strength Ferrous Article, and Article Made Thereby

#56
20070113937
2007-05-24

Forging quench

#57
20070068607
2007-03-29

Method for heat treating thick-walled forgings

#58
20070057227
2007-03-15

Metal quenching medium

#59
20060060268
2006-03-23

Method of making high strength bainite article, and article made thereby

#60
20050217820
2005-10-06

Method and apparatus for cooling foundry castings

#61
20050012250
2005-01-20

Forging quench

#62
20050006828
2005-01-13

Apparatus for heat treatment of structural body parts in the automobile industry