Patents-Review.com
ClassID:

118954 ⎘

C21D1/74 - page 2 - 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

Recent Application in this class:
#301
20090084470
2009-04-02

REDUCED-PRESSURE HEAT TREATMENT JIG AND REDUCED-PRESSURE HEAT TREATMENT METHOD

 #302
20090064821
2009-03-12

Vapor-Reinforced Expanding Volume of Gas to Minimize the Contamination of Products Treated in a Melting Furnace

 #303
20090026666
2009-01-29

Method for batchwise heat treatment of goods to be annealed

 #304
20090020523
2009-01-22

Systems and methods for providing localized heat treatment of metal components

 #305
20080247901
2008-10-09

Carburized and high-frequency hardened part having high strength

 #306
20080237946
2008-10-02

Continuous carburizing furnace

 #307
20080236710
2008-10-02

Method for reducing formation of electrically resistive layer on ferritic stainless steels

 #308
20080202640
2008-08-28

Manufacturing method of rocker arm bearing apparatus

 #309
20080184848
2008-08-07

Vapor-Reinforced Expanding Volume of Gas to Minimize the Contamination of Products Treated in a Melting Furnace

 #310
20080182118
2008-07-31

CONTINUOUS HEAT TREATMENT FURNACE AND UTILIZING THE SAME, METAL TUBE AND HEAT TREATMENT METHOD

 #311
20080149225
2008-06-26

METHOD FOR OXYGEN FREE CARBURIZATION IN ATMOSPHERIC PRESSURE FURNACES

 #312
20080053576
2008-03-06

High-strength hot-dip galvanized steel sheet and method for producing the same

 #313
20080041504
2008-02-21

Method for reducing surface particle shedding

 #314
20080017281
2008-01-24

METHOD OF HARDENING A SURFACE OF A GOLF CLUB HEAD

 #315
20070251612
2007-11-01

Method for heat treatment

 #316
20070181230
2007-08-09

Method for producing mat-surfaced austenitic stainless steel strips

 #317
20070068606
2007-03-29

Single-chamber vacuum furnace with hydrogen quenching

 #318
20060124907
2006-06-15

High-strength hop-dip galvanized steel sheet

 #319
20060124613
2006-06-15

Plasma-assisted heat treatment

 #320
20060086439
2006-04-27

Clean atmosphere heat treat for coated turbine components

 #321
20060037669
2006-02-23

Method for manufacturing stainless steel product by nitrogen absorption treatment and stainless steel product produced by the method

 #322
20050023738
2005-02-03

Method and device for inhibiting contamination of a workpiece

 #323
20050012254
2005-01-20

Annealing apparatus

 #324
18331675
2023-09-26

Preparation method of gradient high-silicon steel by molten salt electrolysis

 #325
17461556
2025-04-22

Organic and metallic aerogels, composition for the organic and metallic aerogels, and method for manufacturing the organic and metallic aerogels

 #326
16704015
2020-06-16

System and method of producing low carbon ferrochrome and low carbon ferrochrome produced thereby

 #327
16596017
2020-05-12

Method for producing low carbon ferrochrome from chromite ore and low carbon ferrochrome produced thereby

 #328
16454283
2019-12-17

Method and system for producing low carbon ferrochrome from chromite ore and low carbon ferrochrome produced thereby