ClassID:

118937

C21D1/52 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering; Methods of heating with flames

Recent Application in this class:
#1
20250388989
2025-12-25

METHOD FOR HEATING STEEL SHEET, METHOD FOR PRODUCING COATED STEEL SHEET, DIRECT FIRED FURNACE, AND CONTINUOUS HOT-DIP GALVANIZING FACILITY

#2
20240102124
2024-03-28

High-resistance steel strip comprising a temperature homogenisation chamber

#3
20230383375
2023-11-30

DIRECT FLAME PREHEATING SECTION FOR A CONTINUOUS METAL STRIP PROCESSING LINE

#4
20230220990
2023-07-13

DIRECT FLAME BURNER UNIT FOR FURNACES FOR THE THERMO-CHEMICAL TREATMENT OF STEEL STRIPS IN CONTINUOUS HOT-DIP GALVANIZING PLANTS

#5
20210299723
2021-09-30

Heating system for drill steel pipe billet and heating method thereof

#6
20210285067
2021-09-16

MICROTREATMENT OF IRON-BASED ALLOY, APPARATUS AND METHOD THEREFOR AND ARTICLES RESULTING THEREFROM

#7
20210198765
2021-07-01

Steel sheet temperature control device and temperature control method

#8
20210147958
2021-05-20

Support device for radiant tubes

#9
20200232706
2020-07-23

Fast response heaters and associated control systems used in combination with metal treatment furnaces

#10
20200232063
2020-07-23

METHOD AND FURNACE FOR THERMALLY TREATING A HIGH-RESISTANCE STEEL STRIP COMPRISING A TEMPERATURE HOMOGENISATION CHAMBER

#11
20190360749
2019-11-28

ROLL-TRANSPORT DEVICE

#12
20190276913
2019-09-12

Method of continuously annealing a strip

#13
20190256937
2019-08-22

Apparatus for microtreatment of iron-based alloy

#14
20190022726
2019-01-24

Large scale metal forming control system and method

#15
20180245176
2018-08-30

600 MPa yield strength-graded, high-stretchability hot-dip aluminum-zinc and color-coated steel plate and manufacturing method therefor

#16
20180245175
2018-08-30

500 MPA yield strength-graded, high-stretchability hot-dip aluminum-zinc and color-coated steel plate and manufacturing method therefore

#17
20180223385
2018-08-09

Increasing steel impact toughness

#18
20180100210
2018-04-12

Method for manufacturing components for gas turbine engines

#19
20180044758
2018-02-15

DEVICE FOR HEATING IRON AND STEEL PRODUCTS, AND METHOD FOR HEATING IRON AND STEEL PRODUCTS

#20
20170253953
2017-09-07

Method of annealing aluminium alloy sheet material

#21
20170218473
2017-08-03

Method for heating steel sheets and device for carrying out the method

#22
20170121784
2017-05-04

Method of hardening a clothing wire for processing textile fibres, and apparatus system therefor

#23
20160377345
2016-12-29

Fast response heaters and associated control systems used in combination with metal treatment furnaces

#24
20160355903
2016-12-08

Apparatus for continuous annealing of strip and method for continuous annealing of same

#25
20160265075
2016-09-15

Screw conveyor made of alloyed steel and tempered by electromagnetic induction or exposure to a flame

#26
20160230259
2016-08-11

Hot-dip galvanized steel sheets and galvannealed steel sheets that have good appearance and adhesion to coating and methods for producing the same (as amended)

#27
20160222500
2016-08-04

Hot-dip galvanized steel sheets and galvannealed steel sheets that have good appearance and adhesion to coating and methods for producing the same

#28
20160222481
2016-08-04

SYSTEM AND METHOD FOR ANNEALING OF AN ITEM, WHICH COMPRISES HEAT-SENSITIVE PARTS AND ANNEALED ITEM

#29
20160193749
2016-07-07

Tie strap with hardened integrated rivet for a saw chain

#30
20160108492
2016-04-21

High-formability and super-strength hot galvanizing steel plate and manufacturing method thereof

#31
20150298199
2015-10-22

Method for producing structural components and chassis components by hot forming, and heating station

#32
20150275326
2015-10-01

PREHEATING AND ANNEALING OF COLD ROLLED METAL STRIP

#33
20150135900
2015-05-21

Method and system for operating a blast furnace with top-gas recycle and a fired tubular heater

#34
20140158256
2014-06-12

Plant and method for hot forming blanks

#35
20130196275
2013-08-01

Process and furnace for treating workpieces

#36
20130189634
2013-07-25

PLANT AND METHOD FOR PREHEATING BLANKS IN RESPONSE TO HOT FORMING

#37
20130152650
2013-06-20

METHOD AND DEVICE FOR TREATMENT OF CONTINUOUS OR DISCRETE METAL PRODUCTS

#38
20120325376
2012-12-27

High-strength cold-rolled steel sheet and method for producing the same

#39
20120125569
2012-05-24

METHOD FOR HEATING LIGHTWEIGHT METAL INGOTS

#40
20110294082
2011-12-01

METAL HEAT TREATING METHODS AND DEVICES

#41
20110187031
2011-08-04

Device and method for heating a metal material

#42
20110171590
2011-07-14

DEVICE FOR HEATING ROD-TYPE WORK PIECES

#43
20110053107
2011-03-03

Method for operating a continuous annealing or galvanization line for a metal strip

#44
20100319821
2010-12-23

Annealing of cold rolled metal strip

#45
20100193081
2010-08-05

PROCESS FOR MANUFACTURING A GALVANNEALED STEEL SHEET BY DFF REGULATION

#46
20100183992
2010-07-22

DEVICE FOR LIMITING THE EXHAUSTING OF COMBUSTION FLUE GASES AT THE INLET OF A FURNACE FOR REHEATING STEEL PRODUCTS

#47
20100132854
2010-06-03

Microtreatment of iron-based alloy, apparatus and method therefor, and articles resulting therefrom

#48
20090188591
2009-07-30

Process for the heat treatment of steel strips

#49
20090174125
2009-07-09

Method and arrangement for heating extended steel products

#50
20090136884
2009-05-28

Direct-Fired Furnace Utilizing An Inert Gas To Protect Products Being Thermally Treated In The Furnace

#51
20090123651
2009-05-14

Continuous Annealing and Hot Dip Plating Method and Continuous Annealing and Hot Dip Plating System of Steel sheet Containing Si

#52
20090039117
2009-02-12

Eyeless sewing needle and fabrication method for the same

#53
20090000708
2009-01-01

Method for manufacture of complex heat treated tubular structure

#54
20080264527
2008-10-30

Integrated metal processing facility

#55
20080178970
2008-07-31

Method for the heat treatment of extended steel products

#56
20070289715
2007-12-20

METHODS AND APPARATUS FOR HEAT TREATMENT AND SAND REMOVAL FOR CASTINGS

#57
20070238061
2007-10-11

Method for heating a metal material

#58
20070160948
2007-07-12

Method and apparatus for heating a sheet-like product

#59
20070122756
2007-05-31

Burner nozzle field comprising integrated heat exchangers

#60
20060032555
2006-02-16

Anti-rust treatment using KLEIN™ gas flame

#61
20050257858
2005-11-24

Integrated metal processing facility

#62
20050145362
2005-07-07

Methods and apparatus for heat treatment and sand removal for castings

#63
20050115648
2005-06-02

Method of heat treatment of stainless steel

#64
20050072549
2005-04-07

Methods and apparatus for heat treatment and sand removal for castings

#65
20050022957
2005-02-03

Methods and apparatus for heat treatment and sand removal for castings