ClassID:

118919

C21D1/18 - page 5 - CPC Classification

Classification description:

General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering Hardening ; Quenching with or without subsequent tempering

Recent Application in this class:
#1201
20100026048
2010-02-04

Method of thermomechanical shaping a final product with very high strength and a product produced thereby

#1202
20090314394
2009-12-24

Method for manufacturing an austenitic steel object

#1203
20090272470
2009-11-05

Method of heat treating cultivating disc, coulter, and seed drill blades made from heat quenched boron steels, such that they can be roller re-edged and re-sharpened, and yet retain excellent toughness, hardness and wear characteristics, and are especially useful in dry sandy soils such as found in certain wheat growing regions

#1204
20090266449
2009-10-29

METHOD OF CARBURIZING AND QUENCHING A STEEL MEMBER

#1205
20090260721
2009-10-22

Method of restrained-quenching of annular member

#1206
20090257903
2009-10-15

Powder Metallurgically Manufactured High Speed Steel

#1207
20090211669
2009-08-27

Method for producing quenched components consisting of sheet steel

#1208
20090183805
2009-07-23

Cooling method of a steel pipe

#1209
20090183804
2009-07-23

Localized induction heating for residual stress optimization

#1210
20090173415
2009-07-09

Steel Sheet Excellent In Fine Blanking Performance and Manufacturing Method of the Same

#1211
20090155623
2009-06-18

High strength nickel alloy welds through precipitation hardening

#1212
20090126838
2009-05-21

Uniform heat treatment process for hardening steel

#1213
20090126835
2009-05-21

Quenching methods and apparatus

#1214
20090126451
2009-05-21

Hot forging facility

#1215
20090104068
2009-04-23

Brake disk excellent in temper softening resistance and toughness

#1216
20090101249
2009-04-23

Method of making a hardened sheet metal part

#1217
20090101240
2009-04-23

Carbonitriding method, machinery component fabrication method, and machinery component

#1218
20090095384
2009-04-16

AQUEOUS QUENCHING MEDIA AND USE THEREOF IN QUENCHING METAL SUBSTRATES

#1219
20090092516
2009-04-09

High strength spring-use heat treated steel

#1220
20090071954
2009-03-19

Induction Tempering Method, Induction Tempering Apparatus, and Induction Tempered Product

#1221
20090038358
2009-02-12

Method of manufacturing seamless pipe and tube

#1222
20090023506
2009-01-22

Induction hardened hollow driving shaft

#1223
20090020525
2009-01-22

Electric induction heat treatment

#1224
20090020194
2009-01-22

Method of Induction Hardening

#1225
20090000710
2009-01-01

Quenching process utilizing compressed air

#1226
20080302501
2008-12-11

Steel for Hot Tooling, and Part Produced From Said Steel, Method for the Production Thereof, and Uses of the Same

#1227
20080271824
2008-11-06

Spring Steel Wire

#1228
20080264529
2008-10-30

Apparatus and Method for Continuously Processing Long Bar by Heat Treatment Using Induction Heating

#1229
20080264528
2008-10-30

ROLLING, SLIDING PART AND PROCESS FOR PRODUCING SAME

#1230
20080236709
2008-10-02

COLD-WORKED STEELS WITH PACKET-LATH MARTENSITE/AUSTENITE MICROSTRUCTURE

#1231
20080230155
2008-09-25

Process and method to increase the hardness of Fe-Cr-C weld overlay alloy

#1232
20080216927
2008-09-11

High Temperature Bolt Material

#1233
20080202652
2008-08-28

Ferrous seal sliding parts and producing method thereof

#1234
20080202640
2008-08-28

Manufacturing method of rocker arm bearing apparatus

#1235
20080190522
2008-08-14

Process for Heat Treatment of Steel or Cast Iron Workpieces

#1236
20080163963
2008-07-10

Heat treatment method and components treated according to the method

#1237
20080141535
2008-06-19

Method for the production of a bearing ring for large-size rolling bearings

#1238
20080083207
2008-04-10

Mower sickle bar

#1239
20080060727
2008-03-13

Ferrous seal sliding parts and producing method thereof

#1240
20080036124
2008-02-14

FURNACE, AND HOT FORMING LINE INCLUDING SUCH A FURNACE

#1241
20070272769
2007-11-29

Method for manufacturing a body

#1242
20070272333
2007-11-29

High strength hot rolled steel sheet having excellent stretch flangeability and its production method

#1243
20070261769
2007-11-15

Method of hot stamping and hardening a metal sheet

#1244
20070261237
2007-11-15

Methods for hardening pump casings

#1245
20070246135
2007-10-25

Method of Manufacturing a Hardened Forged Steel Component

#1246
20070234576
2007-10-11

Cutting members for shaving razors

#1247
20070231183
2007-10-04

Method of producing martensite wear-resistant cast steel with film austenite for enhancement of toughness

#1248
20070204940
2007-09-06

Rolling/sliding member, toroidal continuously variable transmission using the same method of manufacturing rolling/sliding member

#1249
20070194504
2007-08-23

Heat Treatment System

#1250
20070193666
2007-08-23

High Strength Dual Phase Steel With Low Yield Ratio, High Toughness and Superior Weldability

#1251
20070181234
2007-08-09

Spray quench systems for heat treated metal products

#1252
20070175857
2007-08-02

Decorative surface treatment for metals

#1253
20070175549
2007-08-02

Cooling method and manufacturing method of metal part and cooling apparatus for metal part

#1254
20070175288
2007-08-02

Pinion shaft

#1255
20070169850
2007-07-26

Rolling bearing and heat treatment method for steel

#1256
20070154339
2007-07-05

Iron-based sintered alloy and manufacturing method thereof

#1257
20070151634
2007-07-05

Rolling bearing

#1258
20070127860
2007-06-07

Tapered roller bearing an automotive pinion shaft supporting apparatus utilizing same tapered roller bearing

#1259
20070113698
2007-05-24

Steering rack comprising steel bar with rack teeth

#1260
20070089813
2007-04-26

Seamless steel tube which is intended to be used as a guide pipe and production method thereof

#1261
20070079912
2007-04-12

Weldable component of structural steel and method of manufacture

#1262
20070068607
2007-03-29

Method for heat treating thick-walled forgings

#1263
20070062620
2007-03-22

Fixing element comprising a low-alloyed steel and process for the production thereof

#1264
20070017609
2007-01-25

Steel with excellent delayed fracture resistance and tensile strength of 1801 MPa class or more, and its shaped article

#1265
20070012384
2007-01-18

Process for producing tempered steel motor vehicle parts

#1266
20070000580
2007-01-04

Martensitic stainless steel and method of the manufacture

#1267
20060285992
2006-12-21

Steel for a plastic molding die

#1268
20060266448
2006-11-30

Seamless steel pipe for oil wells excellent in sulfide stress cracking resistance and method for producing the same

#1269
20060243355
2006-11-02

Stabilizer bar

#1270
20060231172
2006-10-19

Process for producing steel article

#1271
20060226584
2006-10-12

Steel-member manufacturing facility, thin bearing-member and thrust bearing

#1272
20060219335
2006-10-05

Excellent-strength and excellent-toughness steel and the method of manufacturing the same

#1273
20060219334
2006-10-05

Press-hardened component and process for producing a press-hardened component

#1274
20060219333
2006-10-05

Manufacturing method of seamless steel pipe for mechanical structural parts

#1275
20060185768
2006-08-24

Fixing element comprising a low-alloyed steel and process for the production thereof

#1276
20060180249
2006-08-17

Low alloy high steel tool having constant toughness

#1277
20060175742
2006-08-10

Track bushing and method and apparatus for producing the same

#1278
20060162825
2006-07-27

Weldable steel building component and method for making same

#1279
20060144481
2006-07-06

Track bushing and method and apparatus for producing the same

#1280
20060144480
2006-07-06

Track bushing and method and apparatus for producing the same

#1281
20060137781
2006-06-29

High-strength four-phase steel alloys

#1282
20060130934
2006-06-22

Medical instrument for soft tissue and method for manufacture thereof

#1283
20060086428
2006-04-27

Temper process of sintered Nd-Fe-B permanent magnet

#1284
20060081314
2006-04-20

Steel material with excellent rolling fatigue life and method of producing the same

#1285
20060070687
2006-04-06

Method for producing seamless steel pipe for inflator of air bag

#1286
20060060270
2006-03-23

Nano-scale nitride-particle-strengthened high-temperature wrought ferritic and martensitic steels

#1287
20060054253
2006-03-16

Ferritic heat-resistant steel and method for producing it

#1288
20060032556
2006-02-16

Case-hardened stainless steel foundry alloy and methods of making the same

#1289
20060011274
2006-01-19

Method for producing steel with retained austenite

#1290
20060000526
2006-01-05

Steel strip for razor blades and method of manufacturing the same

#1291
20050263221
2005-12-01

Alloy composition and process for the manufacture of glass making moulds

#1292
20050217763
2005-10-06

Quenched and tempered steel wire with superior cold forging characteristics

#1293
20050211751
2005-09-29

Method of brazing and article made therefrom

#1294
20050189045
2005-09-01

Ferrous seal sliding parts and producing method thereof

#1295
20050161125
2005-07-28

Alloy tool steel

#1296
20050155674
2005-07-21

Hot worked steel and tool made therewith

#1297
20050123434
2005-06-09

Steel and mould tool for plastic materials made of the steel

#1298
20050045247
2005-03-03

Bearing's component, heat treatment method thereof, heat treatment apparatus, and rolling bearing

#1299
20050039830
2005-02-24

Induction heat treatment method and coil and article treated thereby

#1300
20050039826
2005-02-24

High strength steel pipe for an air bag

#1301
20050034795
2005-02-17

Highly impact-resistant steel pipe and method for producing the same

#1302
20050028904
2005-02-10

Method for manufacturing steel parts by continuous copper-brazing and quench hardening

#1303
20050028902
2005-02-10

Method for manufacturing a leaf spring

#1304
20050006828
2005-01-13

Apparatus for heat treatment of structural body parts in the automobile industry

#1305
19011515
2026-03-17

Steel sheet and high strength press hardened steel part having excellent bending and method of manufacturing the same

#1306
18811133
2025-05-27

Steel sheet and high strength press hardened steel part having excellent bending and method of manufacturing the same

#1307
18382254
2024-11-12

Quenching and coating metals using gold-based effervescent tablets

#1308
15895616
2025-06-17

Fastening structures with high coefficient of thermal expansion for reduction of thermally driven stresses in securing aluminum silicon alloys

#1309
14491637
2016-11-22

High-strength, high-toughness steel articles for ballistic and cryogenic applications, and method of making thereof