ClassID:

118942

C21D1/58 - CPC Classification

Classification description:

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

Recent Application in this class:
#1
20250197957
2025-06-19

QUENCHING TOOL AND QUENCHING METHOD

#2
20240410041
2024-12-12

Alloy for Mud Motor Shaft Applications with High Strength, High Impact Toughness and Excellent Fatigue Life

#3
20240344157
2024-10-17

HEAT-TREATMENT OIL COMPOSITION

#4
20240294818
2024-09-05

HEAT-TREATMENT OIL COMPOSITION

#5
20240167135
2024-05-23

CARBIDE REFINING METHOD OF HIGH-CARBON HIGH-ALLOY STEEL

#6
20240093321
2024-03-21

METHODS AND SYSTEMS FOR VACUUM AND OIL AUSTEMPERING IN PRODUCING BAINITE

#7
20240084432
2024-03-14

METHOD FOR HEAT-TREATING BORON STEEL, AND BORON STEEL WITH HIGH STRENGTH AND GOOD TOUGHNESS, AND USE THEREOF

#8
20230119812
2023-04-20

HEAT TREATMENT OIL COMPOSITION

#9
20230094959
2023-03-30

Steel with Controlled Yield Ratio and Manufacturing Method therefor

#10
20220389559
2022-12-08

METHOD OF HEAT TREATING A STEEL COMPONENT

#11
20220307102
2022-09-29

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

#12
20220195549
2022-06-23

High-strength steels for the formation of wear-protective lubricious tribofilms directly from hydrocarbon fluids

#13
20220106653
2022-04-07

QUENCHING METHOD

#14
20220090222
2022-03-24

Drill tool and method for producing same

#15
20220017983
2022-01-20

Carburizing bearing steel and preparation method thereof

#16
20210094132
2021-04-01

Method for manufacturing kitchen knife by using multilayer material

#17
20210087645
2021-03-25

Crankshaft and method of manufacture

#18
20210032713
2021-02-04

METHOD OF PRODUCTION OF STEEL PARTS BY QUENCHING WITH TEMPERATURE EQUALIZATION AT MS

#19
20210009917
2021-01-14

HEAT-TREATMENT OIL COMPOSITION

#20
20210002574
2021-01-07

HEAT-TREATMENT OIL COMPOSITION

#21
20200124363
2020-04-23

HEAT RECOVERY SYSTEM

#22
20200063228
2020-02-27

WIRE ROD FOR SPRINGS WITH EXCELLENT CORROSION FATIGUE RESISTANCE, STEEL WIRE, AND MANUFACTURING METHOD THEREOF

#23
20200048727
2020-02-13

Crankshaft and method of manufacture

#24
20190241987
2019-08-08

Hybrid quench process for hot stamping of steel parts

#25
20190169706
2019-06-06

Sucker rod steel and manufacturing method therefor

#26
20190153556
2019-05-23

Solid lubricant-coated steel articles, method and apparatus for manufacturing thereof and quenching oil used in the manufacturing

#27
20190143398
2019-05-16

LASER-HARDENED FILLET-ROLLED CRANKSHAFT

#28
20190136338
2019-05-09

TEMPERATURE-CONTROL DEVICE FOR COMPONENTS

#29
20190048447
2019-02-14

High Strength Steel Alloy and Strip and Sheet Product Made Therefrom

#30
20190027914
2019-01-24

METHOD OF MANUFACTURING ELECTRICAL FEEDTHROUGH INCLUDING PROCESSES FOR REDUCING STRESS IN PACKAGES HAVING A HIGH-CTE METAL AND LOW-CTE SEALING MATERIAL INTERFACE

#31
20190017141
2019-01-17

Method of heat treating a fastening member

#32
20190003001
2019-01-03

Oil-immersion quenching cooling precursor and oil-immersion quenching cooling method

#33
20180320244
2018-11-08

Track bushing

#34
20180245297
2018-08-30

Highway safety protective fence and method for manufacturing the same

#35
20180179608
2018-06-28

Method for producing turbine rotor and method for producing turbine

#36
20180119243
2018-05-03

Method for producing a planetary gear shaft having increased hardness

#37
20180051751
2018-02-22

Manufacturing method of precision machine tool bearing with high precision stability

#38
20180023022
2018-01-25

Heat treatment oil composition

#39
20180023021
2018-01-25

HEAT TREATMENT OIL COMPOSITION

#40
20180010203
2018-01-11

Vapor film-rupturing agent, and thermal treatment oil composition

#41
20170314117
2017-11-02

ROLLING-CONTACT SHAFT MEMBER

#42
20170268086
2017-09-21

RECOVERY HEAT TREATMENT OF HIGHLY STRAINED COMPONENTS

#43
20170268075
2017-09-21

METHODS FOR QUENCHING METAL TUBES

#44
20170247775
2017-08-31

System and method of making a cast part

#45
20170247633
2017-08-31

Water-based coolant

#46
20170226606
2017-08-10

Method of manufacturing a sliding camshaft

#47
20170182918
2017-06-29

IN-PROCESS LASER HARDENING/FORMING OF VEHICLE SEAT STRUCTURES AND COMPONENTS

#48
20170129556
2017-05-11

Nitrided track pin for track chain assembly of machine

#49
20170120315
2017-05-04

Soil auger and method of manufacture

#50
20170088924
2017-03-30

Alloy for mud motor shaft applications with high strength, high impact toughness and excellent fatigue life

#51
20170009314
2017-01-12

Piston ring and its production method

#52
20160376676
2016-12-29

Method for Manufacturing a Golf Club Head

#53
20160344022
2016-11-24

Metal hydride alloys with improved rate performance

#54
20160333436
2016-11-17

Multilayer Cutting Blade Having a Stainless Steel Core

#55
20160305006
2016-10-20

CARBURIZING ALLOY STEEL HAVING IMPROVED DURABILITY AND METHOD OF MANUFACTURING THE SAME

#56
20160304997
2016-10-20

Carburized alloy steel having improved durability and method of manufacturing the same

#57
20160230244
2016-08-11

Method for thermally treating ring-shaped member

#58
20160230243
2016-08-11

HEAT TREATMENT METHOD FOR RING-SHAPED MEMBER AND HEAT TREATMENT EQUIPMENT FOR RING-SHAPED MEMBER

#59
20160223259
2016-08-04

Multi-chamber furnace for vacuum carburizing and quenching of gears, shafts, rings and similar workpieces

#60
20160215379
2016-07-28

Methods of manufacturing release apparatuses

#61
20160160338
2016-06-09

CARBURIZED ALLOY STEEL HAVING SUPERIOR DURABILITY AND METHOD OF MANUFACTURING THE SAME

#62
20160151902
2016-06-02

Method of manufacturing hydraulic hammer using male and female gauges

#63
20160145120
2016-05-26

Component recovery from metal quenching bath or spray

#64
20160130676
2016-05-12

Rail anchor

#65
20160101452
2016-04-14

Hot extrusion die tool and method of making same

#66
20160076315
2016-03-17

Method for manufacturing superior 13Cr friction-welded drillrod

#67
20150361517
2015-12-17

Heat treatment oil composition

#68
20150259771
2015-09-17

High strength low alloy steel and method of manufacturing

#69
20150013843
2015-01-15

Heat treating oil composition

#70
20140246126
2014-09-04

Method for producing steel component

#71
20140116576
2014-05-01

System and method of making a cast part

#72
20140090754
2014-04-03

Process for cooling a metal workload in a multimedia quench system

#73
20130156627
2013-06-20

Compositions comprising nickel-titanium, methods manufacture thereof and articles comprising the same

#74
20130087256
2013-04-11

Steel wire with high strength for cold forging to improve service life of mold and method of manufacturing the same

#75
20130019796
2013-01-24

Continuous gas carburizing furnace

#76
20120325372
2012-12-27

Method for reduction of time in a gas carburizing process and cooling apparatus utilizing a high speed quenching oil flow rate

#77
20120082587
2012-04-05

High strength low alloyed sintered steel

#78
20110290897
2011-12-01

RAIL ANCHOR

#79
20110284132
2011-11-24

METHOD FOR REDUCTION OF TIME IN A GAS CARBURIZING PROCESS AND COOLING APPARATUS

#80
20110265326
2011-11-03

METHOD FOR MANUFACTURING SINGLE-PIECE FORGED-STEEL PISTON WITH INNER OIL COOLING CHAMBER

#81
20110155290
2011-06-30

Case hardening steel, carburized component, and manufacturing method of case hardening steel

#82
20100282377
2010-11-11

Methods for treating high-strength, low-alloy steel

#83
20100200119
2010-08-12

Hardened martensitic steel having a low or zero content of cobalt, method for producing a component from this steel, and component obtained in this manner

#84
20100186853
2010-07-29

HEAT-TREATMENT OIL COMPOSITION

#85
20100139811
2010-06-10

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

#86
20100037992
2010-02-18

Method for transforming steel blanks

#87
20090308505
2009-12-17

Quenching fluid

#88
20090056834
2009-03-05

Heat treatment oil composition

#89
20090020007
2009-01-22

SINGLE-PIECE FORGED-STEEL PISTON WITH INNER OIL COOLING CHAMBER AND A METHOD FOR MANUFACTURING THEREOF

#90
20090008211
2009-01-08

Clutch member and process for manufacturing the same

#91
20080251165
2008-10-16

Heat treatment system for a composite turbine engine component

#92
20070191241
2007-08-16

Quenching oil for reduced pressure quenching and method for quenching

#93
20070130772
2007-06-14

Method for producing a three-dimensionally formed armoring component for motor vehicle bodies

#94
20050039832
2005-02-24

Quenching oil compositions

#95
20050011597
2005-01-20

Quenching oil compositions