ClassID:

118957

C21D1/767 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering; Methods of treatment in inert gas, controlled atmosphere, vacuum or pulverulent material with forced gas circulation; Reheating thereof

Recent Application in this class:
#1
20250044030
2025-02-06

DEVICE FOR TEMPERING AN OBJECT

#2
20240229185
2024-07-11

Device and Method for Thermal Treatment of a Metal Strip

#3
20240011142
2024-01-11

PROCESSING METHOD AND PROCESSING APPARATUS FOR METAL COMPONENT

#4
20230383375
2023-11-30

DIRECT FLAME PREHEATING SECTION FOR A CONTINUOUS METAL STRIP PROCESSING LINE

#5
20220364192
2022-11-17

GAS QUENCHING CELL

#6
20200385831
2020-12-10

A PROCESS FOR REFINING A NITROGEN-CONTAINING METAL ALLOY

#7
20200208232
2020-07-02

Device for treating metal workpieces with cooling gas

#8
20200048728
2020-02-13

Method and device for manufacturing steam-treated products

#9
20190360749
2019-11-28

ROLL-TRANSPORT DEVICE

#10
20190360062
2019-11-28

Quenching apparatus

#11
20190162474
2019-05-30

Batch furnace for annealing material and method for heat treatment of a furnace material

#12
20190010575
2019-01-10

Device and method for carrying out controlled oxidation of metal strips in a continuous furnace

#13
20190003771
2019-01-03

Heating furnace for heating annular component

#14
20180044746
2018-02-15

Batch furnace for annealing material and method for heat treatment

#15
20180016652
2018-01-18

Heat treatment apparatus

#16
20180010854
2018-01-11

Heat treatment device

#17
20170044643
2017-02-16

METHOD AND APPARATUS FOR PRODUCING A STEEL STRIP

#18
20170003074
2017-01-05

Heating device for annular component and annular cavity thereof

#19
20160265079
2016-09-15

Continuous annealing system and continuous annealing method

#20
20160193687
2016-07-07

RESISTANCE WELDING METHOD FOR SUCKER ROD

#21
20160010187
2016-01-14

Iron-carbon-manganese austenitic steel sheet

#22
20160010173
2016-01-14

Process for manufacturing iron-carbon-maganese austenitic steel sheet with excellent resistance to delayed cracking

#23
20150354898
2015-12-10

Gas quenching cell

#24
20150176901
2015-06-25

Thermal processing furnace for workpieces

#25
20150017593
2015-01-15

Heat treatment method

#26
20140284851
2014-09-25

Hardening cell

#27
20140145381
2014-05-29

Method and apparatus for achieving higher cooling rates of a gas during bypass cooling in a batch annealing furnace of cold rolling mills

#28
20120247627
2012-10-04

Quenching process and apparatus for practicing said process

#29
20120211191
2012-08-23

High pressure heat treatment system

#30
20120067467
2012-03-22

QUENCHING DEVICE AND QUENCHING METHOD

#31
20120024516
2012-02-02

Method and apparatus for achieving higher cooling rates of a gas during bypass cooling in a batch annealing furnace of cold rolling mills

#32
20120013056
2012-01-19

Charging frame and quenching device having a charging frame

#33
20110308672
2011-12-22

Furnace configured for use in both the galvannealing and galvanizing of a metal strip

#34
20110114621
2011-05-19

Retort Furnace for Heat Treating Metal Workpieces

#35
20100236669
2010-09-23

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

#36
20100186608
2010-07-29

Hot isostatic pressing device

#37
20100127421
2010-05-27

BI-DIRECTIONAL FLOW FOR PROCESSING SHAPED BODIES

#38
20100084796
2010-04-08

Iron core annealing furnace

#39
20100001442
2010-01-07

Method and installation for the dry transformation of a material structure of semifinished products

#40
20090315228
2009-12-24

METHOD AND DEVICE FOR COOLING AND STABILIZING STRIP IN A CONTINUOUS LINE

#41
20090308499
2009-12-17

Process for manufacturing iron-carbon-manganese austenitic steel sheet with excellent resistance to delayed cracking, and sheet thus produced

#42
20090218738
2009-09-03

Installation for the dry transformation of a material microstructure of semi-finished products

#43
20090206527
2009-08-20

HIGH PRESSURE HEAT TREATMENT SYSTEM

#44
20090176180
2009-07-09

Hydrogen furnace system and method

#45
20090064749
2009-03-12

Process for producing stainless steel pipe

#46
20090031950
2009-02-05

Furnace configured for use in both the galvannealing and galvanizing of a metal strip

#47
20080237943
2008-10-02

Arrangement and a Method For Heating Metal Objects

#48
20080197546
2008-08-21

Metal heat treatment system hot-gas quenching apparatus and hot-gas heat treatment system

#49
20070251612
2007-11-01

Method for heat treatment

#50
20060201221
2006-09-14

Method of cooling a hot isostatic pressing device and a hot isostatic pressing tool

#51
20060157169
2006-07-20

Gas quenching cell for steel parts

#52
20060131794
2006-06-22

Hydrogen closed-cycle hardening unit

#53
20060103059
2006-05-18

High pressure heat treatment system

#54
20060086442
2006-04-27

Hot gas quenching devices, and hot gas heat treating system

#55
20060086428
2006-04-27

Temper process of sintered Nd-Fe-B permanent magnet

#56
20060051715
2006-03-09

Thermal processing system having slot eductors

#57
20060049556
2006-03-09

Device for homogeneous impingement of a planar surface of a tool with a heated gas

#58
20060048868
2006-03-09

Rapid cooling method for parts by convective and radiative transfer

#59
20050046095
2005-03-03

Flapper gas nozzle assembly

#60
14972110
2018-11-13

Thermal scavenging system to remove residue from interior surface of seamless tube in a bright annealing furnace