ClassID:

118980

C21D6/002 - page 5 - CPC Classification

Classification description:

Heat treatment of ferrous alloys containing Cr

Recent Application in this class:
#1201
20110155290
2011-06-30

Case hardening steel, carburized component, and manufacturing method of case hardening steel

#1202
20110126944
2011-06-02

THICK-WALLED HIGH-STRENGTH HOT ROLLED STEEL SHEET WITH EXCELLENT LOW-TEMPERATURE TOUGHNESS AND METHOD FOR PRODUCING SAME

#1203
20110088819
2011-04-21

AUSTENITIC HEAT RESISTANT ALLOY, HEAT RESISTANT PRESSURE MEMBER COMPRISING THE ALLOY, AND METHOD FOR MANUFACTURING THE SAME MEMBER

#1204
20110070461
2011-03-24

Stainless steel foil for flexible display use

#1205
20110067785
2011-03-24

METHOD OF MANUFACTURING MARTENSITIC STAINLESS STEEL

#1206
20110067475
2011-03-24

Process for producing high-alloy seamless tube

#1207
20110061777
2011-03-17

FERRITIC STAINLESS STEEL SHEET HAVING SUPERIOR PUNCHING WORKABILITY AND METHOD FOR MANUFACTURING THE SAME

#1208
20110061772
2011-03-17

LOW-DENSITY HIGH-TOUGHNESS ALLOY AND THE FABRICATION METHOD THEREOF

#1209
20110033731
2011-02-10

Ferritic stainless steel

#1210
20110030857
2011-02-10

High strength thin steel sheet for the superior press formability and surface quality and galvanized steel sheet and method for manufacturing the same

#1211
20110024005
2011-02-03

Method for producing two-phase stainless steel pipe

#1212
20110008200
2011-01-13

Heat-resistance ferritic stainless steel

#1213
20110005645
2011-01-13

AUSTENITIC STAINLESS STEEL, AND METHOD FOR REMOVING HYDROGEN THEREFROM

#1214
20110000589
2011-01-06

Ferrite-austenite stainless steel sheet excellent in ridging resistance and workability and process for manufacturing the same

#1215
20110000583
2011-01-06

Rolling part and manufacturing method thereof

#1216
20100329884
2010-12-30

Turbine rotor blade

#1217
20100319642
2010-12-23

Roller follower, valve train, induction hardening apparatus, method of heat treatment of shaft member, method of manufacturing shaft, and shaft

#1218
20100308505
2010-12-09

Plastic injection mold of low carbon martensitic stainless steel

#1219
20100294402
2010-11-25

Ferrite-austenite stainless steel sheet for structural component excellent in workability and impact-absorbing property and method for producing the same

#1220
20100289194
2010-11-18

Use and method of producing a dispersion strengthened steel as material in a roller for a roller hearth furnace

#1221
20100276038
2010-11-04

MARTENSITIC STAINLESS STEEL, METHOD FOR MAKING PARTS FROM SAID STEEL AND PARTS THUS MADE

#1222
20100272595
2010-10-28

High strength alloys

#1223
20100248079
2010-09-30

COIL SPRING FOR A FUEL CELL

#1224
20100230016
2010-09-16

High-strength steel plate and producing method therefor

#1225
20100221573
2010-09-02

PROCESS FOR MANUFACTURING STEEL SHEET HAVING HIGH TENSILE STRENGTH AND DUCTILITY CHARACTERISTICS, AND SHEET THUS PRODUCED

#1226
20100221139
2010-09-02

Steel having high mechanical strength and wear resistance

#1227
20100218856
2010-09-02

Cr-Containing Steel Superior in Heat Fatigue Charateristics

#1228
20100193089
2010-08-05

HOT-WORKING TOOL STEEL HAVING EXCELLENT TOUGHNESS AND HIGH-TEMPERATURE STRENGTH AND METHOD FOR PRODUCTION THEREOF

#1229
20100189997
2010-07-29

Stainless steel member for a fuel cell

#1230
20100186857
2010-07-29

INTERNAL HIGH HARDNESS TYPE PEARLITIC RAIL WITH EXCELLENT WEAR RESISTANCE, ROLLING CONTACT FATIGUE RESISTANCE, AND DELAYED FRACTURE PROPERTY AND METHOD FOR PRODUCING SAME

#1231
20100170597
2010-07-08

Method of making an embossed metal gasket

#1232
20100170596
2010-07-08

Process for producing a corrosion-resistant austenitic alloy component

#1233
20100166594
2010-07-01

Austenitic heat resistant alloy

#1234
20100139820
2010-06-10

WEAR-RESISTANT STEEL PLATE HAVING EXCELLENT WEAR RESISTANCE AT HIGH TEMPERATURES AND EXCELLENT BENDING WORKABILITY AND METHOD FOR MANUFACTURING THE SAME

#1235
20100139819
2010-06-10

Method for producing steel part having long rolling contact fatigue life

#1236
20100139811
2010-06-10

Carbonitrided induction hardened steel part superior in surface fatigue strength at high temperature and method of production of same

#1237
20100136357
2010-06-03

COLD-FORMABLE CHROME STEEL

#1238
20100135844
2010-06-03

COLD-WORK DIE STEEL AND DIE

#1239
20100133143
2010-06-03

Compositions produced using an in situ heat treatment process

#1240
20100132846
2010-06-03

Spring element made from a ferritic chromium steel

#1241
20100126632
2010-05-27

MANUFACTURING METHOD FOR HIGH-CONCENTRATION CARBURIZED STEEL

#1242
20100122800
2010-05-20

FERRITIC STAINLESS STEEL AND STEEL SHEET FOR HEAT PIPES, AND HEAT PIPE AND HIGH-TEMPERATURE EXHAUST HEAT RECOVERY SYSTEM

#1243
20100061878
2010-03-11

Ferritic stainless steel sheet for water heater excellent in corrosion resistance at welded part and steel sheet toughness

#1244
20100051145
2010-03-04

EGR COOLER FOR VEHICLES AND METHOD OF MANUFACTURING THE SAME

#1245
20100050617
2010-03-04

FERRITIC STAINLES STEEL FOR EXHAUST GAS PATH MEMBERS

#1246
20100031506
2010-02-11

Method for producing steam generator tube walls consisting primarily of 9-12% martensitic chromium steels

#1247
20100018615
2010-01-28

Thermal mechanical treatment of ferrous alloys, and related alloys and articles

#1248
20100003159
2010-01-07

Low-density high-toughness alloy and the fabrication method thereof

#1249
20100000636
2010-01-07

DUPLEX STAINLESS STEEL

#1250
20090301615
2009-12-10

Method for producing an internal combustion engine valve and valve obtained in this manner

#1251
20090282952
2009-11-19

Cold forged stainless tool and method for making the same

#1252
20090257906
2009-10-15

Cobalt-rich wear resistant alloy and method of making and use thereof

#1253
20090246064
2009-10-01

Austenitic stainless steel tube for boiler with excellent resistance to high temperature steam oxidation

#1254
20090229417
2009-09-17

Methods of thermo-mechanically processing tool steel and tools made from thermo-mechanically processed tool steels

#1255
20090223609
2009-09-10

High-strength hot rolled steel plate and manufacturing method thereof

#1256
20090220815
2009-09-03

Plate

#1257
20090218011
2009-09-03

Method for manufacturing a stainless steel product

#1258
20090202382
2009-08-13

High manganese steel strips with excellent coatability and superior surface property, coated steel strips using steel strips and method for manufacturing the steel strips

#1259
20090148337
2009-06-11

Method of manufacturing Ni-based superalloy component for gas turbine using one-step process of hot isostatic pressing and heat treatment and component manufactured thereby

#1260
20090120535
2009-05-14

METHOD OF BONDING STEEL MEMBERS, METHOD OF ENHANCING BONDING STRENGTH OF UNITED BODY FORMED OF STEEL MEMBERS, STEEL PRODUCT, AND DIE-CAST PRODUCT

#1261
20090107587
2009-04-30

Tool steels and manufacturing method thereof

#1262
20090098009
2009-04-16

Low chromium stainless steel superior in corrosion resistance of multipass welded heat affected zones and its method of production

#1263
20090092513
2009-04-09

Ferritic stainless steel sheet superior in heat resistance

#1264
20090090767
2009-04-09

METHOD AND SYSTEM FOR RESTORING PARENT METAL PROPERTIES ACROSS WELDS

#1265
20090065104
2009-03-12

Method of producing a cold-rolled strip with a ferritic structure

#1266
20090056838
2009-03-05

Ferritic stainless steel sheet having excellent corrosion resistance and method of manufacturing the same

#1267
20090053097
2009-02-26

Fire-resistant steel material superior in HAZ toughness of welded joint and method of production of same

#1268
20090047166
2009-02-19

Low alloy steel, seamless steel oil country tubular goods, and method for producing seamless steel pipe

#1269
20090035602
2009-02-05

High-strength steel with excellent unsusceptibility to hydrogen embrittlement

#1270
20090004040
2009-01-01

Ferritic stainless steel sheet for raw material pipe for bellows pipe

#1271
20090000703
2009-01-01

Ferritic stainless steel sheet superior in shapeability and method of production of the same

#1272
20080308198
2008-12-18

Austenitic stainless steel, manufacturing method for the same, and structure using the same

#1273
20080251161
2008-10-16

High strength cold rolled steel sheet and plated steel sheet excellent in the balance of strength and workability

#1274
20080236710
2008-10-02

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

#1275
20080216927
2008-09-11

High Temperature Bolt Material

#1276
20080210352
2008-09-04

Method for heat-treating steel material

#1277
20080174115
2008-07-24

Power systems utilizing the heat of produced formation fluid

#1278
20080173450
2008-07-24

Time sequenced heating of multiple layers in a hydrocarbon containing formation

#1279
20080173449
2008-07-24

Sour gas injection for use with in situ heat treatment

#1280
20080173444
2008-07-24

Alternate energy source usage for in situ heat treatment processes

#1281
20080173442
2008-07-24

Sulfur barrier for use with in situ processes for treating formations

#1282
20080159901
2008-07-03

Steel having high mechanical strength and wear resistance

#1283
20080156399
2008-07-03

High-Concentration Carburized/Low-Strain Quenched Member and Process for Producing the Same

#1284
20080149047
2008-06-26

Shot-blasted steam boiler members, steam boiler assemblies or power station components

#1285
20080138233
2008-06-12

Ferritic stainless steel for automobile exhaust gas passage components and welded steel pipe

#1286
20080105341
2008-05-08

HEAT TREATMENT OF INLAID PRESSURE VESSELS

#1287
20080096037
2008-04-24

Sreading knives, doctor blades and crepe scrapers and powder metallurgical method for producing the same

#1288
20080089804
2008-04-17

Martensitic free cutting stainless steel

#1289
20080078478
2008-04-03

Method of manufacturing martensitic stainless steel

#1290
20080073004
2008-03-27

PROCESS OF USING A CHROMIUM STEEL AS RAW MATERIAL FOR CORROSION-RESISTANT SPRING ELEMENTS

#1291
20080047636
2008-02-28

Method of Manufacturing Metal Gasket

#1292
20080042370
2008-02-21

Metal gasket

#1293
20080038144
2008-02-14

High strength alloys

#1294
20080035705
2008-02-14

Welding shield for coupling heaters

#1295
20080035348
2008-02-14

Temperature limited heaters using phase transformation of ferromagnetic material

#1296
20080035347
2008-02-14

Adjusting alloy compositions for selected properties in temperature limited heaters

#1297
20080035346
2008-02-14

Methods of producing transportation fuel

#1298
20080017380
2008-01-24

Non-ferromagnetic overburden casing

#1299
20070289733
2007-12-20

Wellhead with non-ferromagnetic materials

#1300
20070284108
2007-12-13

Compositions produced using an in situ heat treatment process

#1301
20070246136
2007-10-25

Method of manufacturing a martensitic stainless steel pipe

#1302
20070234576
2007-10-11

Cutting members for shaving razors

#1303
20070231183
2007-10-04

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

#1304
20070217293
2007-09-20

Decorative product and timepiece

#1305
20070204940
2007-09-06

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

#1306
20070199632
2007-08-30

Steel part having long rolling contact fatigue life and method for producing the same

#1307
20070199630
2007-08-30

Method for manufacturing a high speed tool steel

#1308
20070186999
2007-08-16

Method for manufacturing a stainless steel product and a stainless steel product manufactured by the method

#1309
20070144634
2007-06-28

Ferritic Cr-contained steel

#1310
20070084528
2007-04-19

Low-density high-toughness alloy and the fabrication method thereof

#1311
20070065717
2007-03-22

Material of case for storage cell

#1312
20070045384
2007-03-01

Method for manufacturing gas and liquid storage tanks

#1313
20070006461
2007-01-11

Method for manufacturing automotive structural members

#1314
20070000580
2007-01-04

Martensitic stainless steel and method of the manufacture

#1315
20060285992
2006-12-21

Steel for a plastic molding die

#1316
20060191600
2006-08-31

Steel and component of structural equipment for use in a hydrogen gas environment, and a method for the manufacture thereof

#1317
20060180249
2006-08-17

Low alloy high steel tool having constant toughness

#1318
20060137781
2006-06-29

High-strength four-phase steel alloys

#1319
20060130934
2006-06-22

Medical instrument for soft tissue and method for manufacture thereof

#1320
20060086431
2006-04-27

Surface on a stainless steel matrix

#1321
20060081314
2006-04-20

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

#1322
20060070685
2006-04-06

Thin-walled bearing component, produced without material-removing machining

#1323
20060054253
2006-03-16

Ferritic heat-resistant steel and method for producing it

#1324
20060037669
2006-02-23

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

#1325
20060034724
2006-02-16

High-nitrogen austenitic stainless steel

#1326
20060000526
2006-01-05

Steel strip for razor blades and method of manufacturing the same

#1327
20050279434
2005-12-22

Spring element made from a ferritic chromium steel

#1328
20050279425
2005-12-22

Ferritic stainless steel which can be used for ferromagnetic parts

#1329
20050271541
2005-12-08

Martensitic stainless steel

#1330
20050269074
2005-12-08

Case hardened stainless steel oilfield tool

#1331
20050257861
2005-11-24

Dual seam-welded air hardenable steel tubing and structural members

#1332
20050241737
2005-11-03

Cr steel for structural use and method for producing the same

#1333
20050217769
2005-10-06

Cold-formable chrome steel

#1334
20050211348
2005-09-29

Heat-resistant ferritic stainless steel and method for production thereof

#1335
20050155674
2005-07-21

Hot worked steel and tool made therewith

#1336
20050145308
2005-07-07

Component for use in oil field technology made of a material which comprises a corrosion-resistant austenitic steel alloy

#1337
20050139298
2005-06-30

Use of a chromium steel as raw material for corrosion-resistant spring elements and method for producing said chrome steel

#1338
20050123434
2005-06-09

Steel and mould tool for plastic materials made of the steel

#1339
20050115648
2005-06-02

Method of heat treatment of stainless steel

#1340
20050115647
2005-06-02

Martensitic stainless steel seamless pipe and a manufacturing method thereof

#1341
20050098244
2005-05-12

Method for manufacturing metallic bellows

#1342
20050084406
2005-04-21

Method of manufacturing oxide dispersion strengthened martensitic steel excellent in high-temperature strength having residual α-grains

#1343
20050042127
2005-02-24

Method for producing dispersed oxide reinforced ferritic steel having coarse grain structure and being excellent in high temperature creep strength

#1344
19011515
2026-03-17

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

#1345
18811133
2025-05-27

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

#1346
17231362
2023-11-07

Sinter brazing of powdered metal sinter hard matertial component to a wrought steel component

#1347
17062078
2023-10-31

Ultra-high strength hot-rolled steel with toughness and method of making same

#1348
16704015
2020-06-16

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

#1349
16596017
2020-05-12

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

#1350
16454283
2019-12-17

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