| Patents for C21D 3 - Diffusion processes for extraction of non-metals; Furnaces therefor (566) |
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| 04/20/2005 | EP1524333A1 Process for applying a coating |
| 03/24/2005 | US20050064095 Method for applying wear and corrosion resistant coating to cast iron |
| 03/23/2005 | CN1598056A Method for applying wear and corrosion resistant coating to cast iron |
| 03/19/2005 | CA2481717A1 Method for applying wear and corrosion resistant coating to cast iron |
| 02/15/2005 | US6855217 Heating surface layers of steel parts with a high frequency or ultra-high frequency to generate difference in temperature between surface layers and interiors of the parts, the heating effective for causing distortion in lattices |
| 12/02/2004 | DE10320036A1 Determining diffusion coefficient of carbon in steels comprises embedding sample of steel in oxidizing powder, annealing, measuring resulting decarburizing profile, and mathematically analyzing |
| 11/25/2004 | US20040231752 Ultra-high magnetic flux density undirectional electrical sheet excellent in high magnetic field iron loss and coating characteristics and production method therefor |
| 10/12/2004 | US6803712 Cold rolled steel sheet comprising carbon, silicon, manganese, phosphorus, sulfur, aluminum, nitrogen, boron, and iron; image receiving tubes; etching, uniform within same coil, press formability |
| 09/15/2004 | CN1529764A Ultra-high magnetic fiux density unidirectional electrical steel sheet excellent in high magnetic field iron loss and coating characteristic and production method thereof |
| 07/27/2004 | US6767412 Method for producing non-grain-oriented magnetic steel sheet |
| 05/13/2004 | US20040091749 Method of making coated cemented carbide cutting tools |
| 05/11/2004 | US6733599 Decarburization annealing followed by coating of annealing separator and final annealing, wherein alumina powder is used as annealing separator |
| 04/21/2004 | EP1411139A1 Ultra-high magnetic flux density unidirectional electrical sheet excellent in high magnetic field iron loss and coating characteristics and production method therefor |
| 03/03/2004 | CN1478906A Non-oxidizing decarbon technology of high carbon content steel in heat treatment annealing |
| 12/17/2003 | EP1049552B1 Steel powder for the preparation of sintered products |
| 12/17/2003 | CN1462315A Method for producing unidirectional silicons steel sheet free of inorganic mineral coating film |
| 10/29/2003 | EP1172451B1 Material for shadow mask, method for production thereof, shadow mask and image receiving tube |
| 10/21/2003 | US6635125 Grain-oriented electrical steel sheet excellent in film characteristics and magnetic characteristics, process for producing same, and decarburization annealing facility used in same process |
| 10/21/2003 | US6635121 Method and apparatus for controlling the decarburization of steel components in a furnace |
| 10/09/2003 | US20030188806 Decarburization annealing followed by coating of annealing separator and final annealing, wherein alumina powder calcined at temperature of 900-1,400 degrees C is used as annealing separator |
| 10/09/2003 | US20030188805 Last forming pass of hot rolling is carried out in the mixed region austenite/ferrite wherein total deformation epsilon H achieved during rolling in mixed region austenite/ferrite is less-than 35%; thicker magnetic steel sheet |
| 10/02/2003 | US20030183304 Excellent in high magnetic field core loss property containing, in percentage by weight, not greater than 0.005% of C, 2.0-7.0% of Si, not greater than 0.2% of Mn, one or both of S and Se in a total amount of not greater than 0.005%, |
| 09/18/2003 | US20030175145 Comprises hot/cold rolling steel sheet, pickling, then annealing |
| 09/16/2003 | US6620262 Method of manufacturing inner and outer races of deep groove ball bearing in continuous annealing furnace |
| 09/10/2003 | EP1342799A1 Method for baking steel part |
| 09/03/2003 | EP1339892A1 Method of making coated cemented carbide cutting tools |
| 08/27/2003 | CN1438926A Method of production of surface densified powder metal components |
| 08/21/2003 | US20030155041 Method of production of surface densified powder metal components |
| 08/06/2003 | CN1116944C Steel powder for the prepn. of sintered products |
| 07/30/2003 | EP1049553B1 Process of preparing an iron-based powder in a gas-tight furnace |
| 07/17/2003 | US20030131912 The concentration of CO2 and/or CO in the furnace is monitored by an analyzer; injecting inert gas into the furnace at least twice per hour in response to elevated carbon oxide concentration |
| 06/04/2003 | CN1110575C Shadow mask material, its producing method, shadow mask and image tube |
| 05/20/2003 | US6565674 High flux density grain-oriented electrical steel sheet excellent in high magnetic field core loss property and method of producing the same |
| 05/07/2003 | CN1107731C Method for mfg. cold rolled shadow mask steel sheet using pack annealing tech |
| 04/02/2003 | EP1298225A1 Method for producing unidirectional silicon steel sheet free of inorganic mineral coating film |
| 03/26/2003 | EP1294511A1 Method of production of surface densified powder metal components |
| 02/27/2003 | US20030037849 Heating surface layers of steel parts with a high frequency or ultra-high frequency to generate difference in temperature between surface layers and interiors of the parts, the heating effective for causing distortion in lattices |
| 01/30/2003 | WO2003008654A1 Ultra-high magnetic flux density unidirectional electrical sheet excellent in high magnetic field iron loss and coating characteristics and production method therefor |
| 12/11/2002 | EP1263993A1 Method for producing non grain-oriented electric sheets |
| 11/07/2002 | WO2002088403A1 Method for producing unidirectional silicon steel sheet free of inorganic mineral coating film |
| 10/29/2002 | US6471787 Process for the production of oriented-grain electrical steel sheet with high magnetic characteristics |
| 10/09/2002 | EP1247871A2 Process for producing highly ductile black plate and use of a steel |
| 10/03/2002 | US20020139444 Grain-oriented electrical steel sheet excellent in film characteristics and magnetic characteristics, process for producing same, and decarburization annealing facility used in same process |
| 09/17/2002 | US6451128 Hot rolling annealing; cold rolling decarbonization; controlling concentration |
| 08/07/2002 | CN1088760C Method for manufacturing high magnetic flux density grain oriented electrical steel sheet based on low temperature slab heating method |
| 07/31/2002 | CN1088475C Unidirectional electromagnetic steel sheet having excellent film characteristics and magnetic characteristics, its production method and decarburization annealing setup therefor |
| 07/11/2002 | DE10117118C1 Production of fine sheet metal used in the production of cans comprises casting a steel to slabs or thin slabs, cooling, re-heating, hot rolling in several passes |
| 07/03/2002 | EP0690758B1 Surface decarburization of a drill bit having a refined primary cutting edge |
| 06/18/2002 | US6406557 Process for the treatment of grain oriented silicon steel |
| 06/13/2002 | WO2002046479A1 Method for baking steel part |
| 05/30/2002 | WO2002042515A1 Method of making coated cemented carbide cutting tools |
| 05/29/2002 | CN1085733C Continuous annealing furnace, rolling bearing, annealing method, and method of manufacturing inner and outer races of deeply groove ball bearing |
| 05/28/2002 | US6395104 Method of producing unidirectional electromagnetic steel sheet having excellent film characteristics and magnetic characteristics |
| 05/15/2002 | EP1205563A1 Surface decarburization of a drill bit having a refined primary cutting edge |
| 05/15/2002 | CN1084650C Process for prepn. of iron-based powder |
| 05/08/2002 | EP1203828A1 Surface decarburization of a drill bit having a refined primary cutting edge |
| 04/09/2002 | US6367687 Method for preparing a plate rim for brazing |
| 04/03/2002 | CN1343263A Material for shadow mask, method for production thereof, shadow mask and image tube |
| 03/21/2002 | US20020033206 Hot rolling, cold rolling, crystallization, decarboxylation |
| 03/12/2002 | US6355121 Modified etching bath for the deposition of a protective surface chemistry that eliminates hydrogen absorption at elevated temperatures |
| 03/12/2002 | US6355087 Monitoring |
| 03/06/2002 | CN1080318C Production of grain oriented silicon steel sheet |
| 02/19/2002 | US6348080 Steel powder for the preparation of sintered products |
| 01/17/2002 | US20020005231 Grain oriented electromagnetic steel sheet and manufacturing thereof |
| 01/16/2002 | EP1172451A1 Material for shadow mask, method for production thereof, shadow mask and image receiving tube |
| 01/09/2002 | CN1077601C Method for producing silicon-chromium grain oriented electrical steel |
| 01/03/2002 | WO2002000378A1 Method of production of surface densified powder metal components |
| 01/02/2002 | CN1077142C Process for production of oriented-grain electrical steel sheet with high magnetic characteristics |
| 12/19/2001 | EP0914224B1 Process for the preparation of an iron-based powder |
| 12/04/2001 | US6325866 Process for the production of grain oriented silicon steel sheet |
| 11/28/2001 | EP0950120B1 Process for the treatment of grain oriented silicon steel |
| 10/17/2001 | CN1073163C Process for treating grain oriented silicon steel |
| 10/04/2001 | EP0950118B1 Process for the production of grain oriented silicon steel sheet |
| 10/04/2001 | EP0709470B1 Production method of directional electromagnetic steel sheet of low temperature slab heating system |
| 09/26/2001 | CN1071799C High flux density low iron loss grain orientation electromagnetic steel palte and its manufacture method |
| 09/20/2001 | WO2001068925A1 Method for producing non grain-oriented electric sheets |
| 08/28/2001 | US6280534 Grain oriented electromagnetic steel sheet and manufacturing thereof |
| 07/26/2001 | DE10015691C1 Production of a non-grain oriented hot-rolled magnetic steel sheet used in the production of engines comprises rolling a pre-material made of an iron alloy and deforming in the mixed austenite/ferrite region |
| 05/02/2001 | EP1095166A1 Apparatus and process for treating a particulate material within a rotating retort |
| 04/19/2001 | WO2001027339A1 Method for producing steel and use thereof in steel construction |
| 03/21/2001 | CN1288402A Steel powder for the prepn. of sintered products |
| 02/28/2001 | EP0998587B1 Method for producing grain oriented electric sheets |
| 02/27/2001 | US6193819 Method for manufacturing cold rolled shadow mask steel sheet with stacked annealing |
| 02/08/2001 | DE19949070C1 Process for improving the surface properties of a low-alloyed tempering steel comprises carrying out edge-decarburization to a depth that corresponds to specified percentage of the steel composition found below the surface |
| 01/24/2001 | CN1061100C Method for manufacturing grain orientational silicon steel sheet with fine magnetic property |
| 01/17/2001 | CN1060815C Process for producing nondirectional electrical steel sheet excellent in close adhesion of insulation film |
| 12/07/2000 | WO2000073518A1 Method for producing steel sheet for shadow mask being excellent in accuracy of thickness in longitudinal direction |
| 12/06/2000 | EP1057898A2 High flux density grain-oriented electrical steel sheet excellent in high magnetic field core loss property and method of producing the same |
| 11/22/2000 | EP0950119B1 Process for the production of oriented-grain electrical steel sheet with high magnetic characteristics |
| 11/16/2000 | DE19922945A1 Verfahren und Vorrichtung zur Emaillierung der Oberfläche eines Stahlkörpers Method and apparatus for enamelling the surface of a steel body |
| 11/15/2000 | EP1052310A2 Process and apparatus for enamelling the surface of a steel object |
| 11/08/2000 | EP1049553A1 Process of preparing an iron-based powder in a gas-tight furnace |
| 11/08/2000 | EP1049552A1 Steel powder for the preparation of sintered products |
| 10/03/2000 | US6127046 Formation of a graphite-free surface in a ferrous material to produce an improved intermetallic bond |
| 10/03/2000 | CA2197015C Method and apparatus for heat treatment including h2/h20 furnace region control |
| 09/21/2000 | WO2000055383A1 Material for shadow mask, method for production thereof, shadow mask and image receiving tube |
| 07/12/2000 | CN1259582A Method for mfg. cold rolled shadow mask steel sheet using pack annealing technology |
| 06/13/2000 | US6074496 High-strength oil-tempered steel wire with excellent spring fabrication property and method for producing the same |
| 05/30/2000 | CA2040245C Method of producing grain oriented silicon steel sheets having less iron loss |
| 05/25/2000 | DE19852450A1 Verfahren zur Oberflächenhärtung von Formkörpern aus Gußwerkstoff sowie dadurch hergestellte Formkörper und deren Verwendung A process for surface hardening of molded bodies of cast material, and molded articles produced thereby, and their use |