ClassID:

118948

C21D1/64 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering; Quenching devices for bath quenching with circulating liquids

Recent Application in this class:
#1
20240043946
2024-02-08

FLUID GUIDE FOR QUENCHING METAL WORKPIECES

#2
20220106653
2022-04-07

QUENCHING METHOD

#3
20200124363
2020-04-23

HEAT RECOVERY SYSTEM

#4
20190345578
2019-11-14

Lead-free patenting process and equipment

#5
20190338390
2019-11-07

METHOD AND EQUIPMENT FOR CONTROLLED PATENTING OF STEEL WIRE

#6
20190107152
2019-04-11

Bearing ring for roller bearing, method for manufacturing the same, and roller bearing

#7
20190003001
2019-01-03

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

#8
20180066330
2018-03-08

Wall member useful in quenching

#9
20170198367
2017-07-13

Quenching apparatus and method for producing metallic material

#10
20160273063
2016-09-22

Quenching tank system and method of use

#11
20160145120
2016-05-26

Component recovery from metal quenching bath or spray

#12
20160024606
2016-01-28

Sub-zero treatment device

#13
20150361536
2015-12-17

Forced water cooling of thick steel wires

#14
20140311711
2014-10-23

Cooling tank for rails

#15
20140241481
2014-08-28

Quench tank and liquid metal loop

#16
20140230972
2014-08-21

Wall member useful in quenching

#17
20140159286
2014-06-12

Rod or wire manufacturing system, related methods, and related products

#18
20140090754
2014-04-03

Process for cooling a metal workload in a multimedia quench system

#19
20130160903
2013-06-27

Method for quenching steel pipe and method for producing steel pipe using the same

#20
20120318305
2012-12-20

Device and Method for Controllably Cooling Metal Billets to be Hot Extruded

#21
20120222704
2012-09-06

System, method and apparatus for recycling quenching medium

#22
20120098171
2012-04-26

Cooling tank for rails

#23
20120018061
2012-01-26

LIQUID QUENCH

#24
20090308503
2009-12-17

Rod or wire manufacturing system, related methods, and related products

#25
20080011394
2008-01-17

Thermodynamic metal treating apparatus and method

#26
20050104266
2005-05-19

Vacuum furnace with pressurized intensive water quench tank