| Patents for C21D 3 - Diffusion processes for extraction of non-metals; Furnaces therefor (566) |
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| 05/18/2000 | WO2000028098A1 Apparatus and process for treating a particulate material within a rotating retort |
| 05/17/2000 | EP1001040A1 Process for surface hardening of workpieces from casting materials, workpieces produced thereby and their use |
| 05/10/2000 | EP0998587A1 Method for producing grain oriented electric sheets and use of a steel for electric sheets |
| 03/29/2000 | CN1249005A Continuous annealing furnace, rolling bearing, annealing method, and method of manufacturing inner and outer races of deeply groove ball bearing |
| 03/01/2000 | CN1049927C Method for making non-aging canned steel plate with good working performance |
| 02/22/2000 | US6027544 Process for the preparation of an iron-based powder |
| 02/15/2000 | CA2024226C Magnesium oxide coating for electrical steels and a method of coating |
| 02/09/2000 | CN1244220A Process for the treatment of grain oriented silicon steel |
| 01/19/2000 | CN1242058A Process for the production of grain oriented silicon steel sheet |
| 01/19/2000 | CN1242057A Process for the production of oriented-grain electrical steel sheet with high magnetic characteristics |
| 11/17/1999 | EP0957180A2 Grain oriented electromagnetic steel sheet and manufacturing thereof |
| 11/16/1999 | US5985059 Transition metal salt compositions that eliminate hydrogen absorption and enhance hydrogen degassing of metal and metal alloys |
| 10/20/1999 | EP0950120A1 Process for the treatment of grain oriented silicon steel |
| 10/20/1999 | EP0950119A1 Process for the production of oriented-grain electrical steel sheet with high magnetic characteristics |
| 10/20/1999 | EP0950118A1 Process for the production of grain oriented silicon steel sheet |
| 10/06/1999 | EP0947597A2 Method of producing a grain-oriented electrical steel sheet excellent in magnetic characteristics |
| 10/06/1999 | CN1231001A Method for manufacturing high magnetic flux density grain oriented electrical steel sheet based on low temperature slab heating method |
| 09/15/1999 | CN1228726A Process for preparation of iron-based powder |
| 08/31/1999 | CA2175401C Magnetic steel sheet having excellent magnetic characteristics and blanking performance |
| 08/25/1999 | CN1226935A Unidirectional electromagnetic steel sheet having excellent film characteristics and magnetic characteristics, its production method and decarburization annealing setup therefor |
| 08/03/1999 | US5932032 Die casting low melting soft magnetic alloy to form nonporous magnet without die tool wear, then extracting melting point-lowering element from alloy by heat treatment in reactive hydrogen atmosphere |
| 07/29/1999 | WO1999037425A1 Process of preparing an iron-based powder in a gas-tight furnace |
| 07/29/1999 | WO1999037424A1 Steel powder for the preparation of sintered products |
| 07/14/1999 | EP0914479A4 Steel for enameling and method of making it |
| 07/08/1999 | WO1999034023A1 Continuous annealing furnace, rolling bearing, annealing method, and method of manufacturing inner and outer races of deeply groove ball bearing |
| 06/30/1999 | EP0926250A1 Unidirectional electromagnetic steel sheet having excellent film characteristics and magnetic characteristics, its production method and decarburization annealing setup therefor |
| 06/24/1999 | DE19810139C1 Minimising hydrogen@ absorption during heat treatment of an aluminium@ alloy workpiece |
| 06/10/1999 | DE19855908A1 Intermetallic bonding of a ferrous metal surface to another metallic surface involves surface graphite removal |
| 05/12/1999 | EP0914479A1 Steel for enameling and method of making it |
| 05/12/1999 | EP0914224A1 Process for the preparation of an iron-based powder |
| 05/04/1999 | US5898994 Method for repairing a nickel base superalloy article |
| 04/01/1999 | WO1999002742A3 Method for manufacturing high magnetic flux density grain oriented electrical steel sheet based on low temperature slab heating method |
| 03/23/1999 | US5885374 Process for producing grain oriented silicon steel sheet and decarburized sheet |
| 03/16/1999 | US5882445 Method of making semi-finished metal products |
| 02/25/1999 | WO1999009221A1 Method for producing grain oriented electric sheets and use of a steel for electric sheets |
| 02/18/1999 | DE19735062A1 Grain oriented electrical steel sheet production |
| 01/21/1999 | WO1999002742A2 Method for manufacturing high magnetic flux density grain oriented electrical steel sheet based on low temperature slab heating method |
| 01/20/1999 | EP0770148B1 Process for producing metallic semi-finished products |
| 01/12/1999 | CA2107372C Method for producing regular grain oriented electrical steel using a single stage cold reduction |
| 12/29/1998 | US5853499 Grain-oriented electrical steel sheet and method of manufacturing the same |
| 12/09/1998 | CN1041113C Method and apparatus for decarbonizing granular iron of blast furnace |
| 12/02/1998 | CN1040998C Method for prodn. of grain-oriented magnetic steel plate with improved loss of remagnetization |
| 11/10/1998 | US5833768 Decarburization annealing process including a pretreatment rapid heating/cooling sequence carried out in non-oxidizing atmosphere to inhibit fayalite crystal growth and preferentially crystallize forsterite |
| 10/22/1998 | WO1998046803A1 Unidirectional electromagnetic steel sheet having excellent film characteristics and magnetic characteristics, its production method and decarburization annealing setup therefor |
| 10/22/1998 | WO1998046802A1 New process for the production of grain oriented electrical steel from thin slabs |
| 10/22/1998 | WO1998046801A1 New process for the production at low temperature of grain oriented electrical steel |
| 10/13/1998 | US5821500 Process for manufacturing welding wire |
| 09/15/1998 | US5807441 Decarburization, annealing |
| 09/08/1998 | US5803988 Method for manufacturing non-oriented electrical steel sheet showing superior adherence of insulating coated layer |
| 09/02/1998 | EP0861914A1 Method for producing silicon-chromium grain oriented electrical steel |
| 09/02/1998 | CN1191900A Method for producing silicon-chromium grain oriented electrical steel |
| 09/01/1998 | US5800633 Method for making high magnetic density, low iron loss, grain oriented electromagnetic steel sheet |
| 08/19/1998 | EP0858860A1 Process for manufacturing welding wire |
| 07/21/1998 | US5782999 Containing carbon, manganese, aluminum, nitrogen and niobium;excellent strength; automatic laundering machines |
| 07/15/1998 | EP0852527A2 Process for removing graphite from the surface area of a workpiece and the workpiece thus obtained |
| 07/14/1998 | US5779819 Grain oriented electrical steel having high volume resistivity |
| 07/02/1998 | WO1998028453A1 Process for the treatment of grain oriented silicon steel |
| 07/02/1998 | WO1998028452A1 Process for the production of oriented-grain electrical steel sheet with high magnetic characteristics |
| 07/02/1998 | WO1998028451A1 Process for the production of grain oriented silicon steel sheet |
| 06/30/1998 | US5772428 Method and apparatus for heat treatment including H2 /H2 O furnace region control |
| 06/02/1998 | US5759294 Process for the production of grain oriented magnetic steel sheets having improved remagnetization losses |
| 06/02/1998 | US5759293 Crystal microstructure |
| 05/19/1998 | US5753056 Transition metal salt compositions that eliminate hydrogen absorption and enhance hydrogen degassing of aluminum |
| 04/29/1998 | EP0838289A1 Method for producing of massive magnet bodies |
| 03/24/1998 | US5731567 Thermal working method of metal material containing helium and thermal working apparatus therefor |
| 03/11/1998 | CN1175979A Process for producing nondirectional electrical steel sheet excellent in close adhesion of insulating film |
| 03/10/1998 | US5725681 Process for producing grain oriented silicon steel sheet, and decarburized sheet |
| 02/25/1998 | CN1174241A Method and apparatus for heat treatment including H2/H2O furnace region control |
| 02/17/1998 | US5718775 Having specified crystal structure, magnetic properties; transformers, power generators |
| 02/04/1998 | EP0690758A4 Surface decarburization of a drill bit having a refined primary cutting edge |
| 02/03/1998 | US5714017 Magnetic steel sheet having excellent magnetic characteristics and blanking performance |
| 01/29/1998 | WO1998003687A1 Steel for enameling and method of making it |
| 01/29/1998 | WO1998003291A1 Process for the preparation of an iron-based powder |
| 01/29/1998 | CA2239025A1 Steel for enameling and method of making it |
| 01/27/1998 | US5711825 Process for the production of grain oriented magnetic steel sheets having improved remagnetization losses |
| 12/30/1997 | US5702541 High magnetic density, low iron loss, grain oriented electromagnetic steel sheet and a method for making |
| 12/30/1997 | US5702539 Method for producing silicon-chromium grain orieted electrical steel |
| 12/29/1997 | EP0813930A2 Method for repairing a nickel base superalloy article |
| 12/09/1997 | CA2111499C Annealing of carbon steels in noncryogenically generated nitrogen |
| 09/03/1997 | EP0792940A1 Method and apparatus for heat treatment including H2/H2O furnace region control |
| 08/05/1997 | US5653821 Heating; hot rolling; colding rolling in two stages with a decarburization annealing |
| 07/23/1997 | EP0694083B1 Method for removing sulfur from superalloy articles to improve their oxidation resistance |
| 07/01/1997 | US5643370 Hot rolled strips of silicon, carbon, aluminum, sulfur, iron and manganese alloys with nitrogen with annealing and cold rolling |
| 06/26/1997 | WO1997022723A1 Process for producing nondirectional electrical steel sheet excellent in close adhesion of insulating film |
| 06/12/1997 | WO1997011809A3 Process for removing graphite from the surface area of a workpiece and the workpiece thus obtained |
| 05/28/1997 | EP0775752A1 Grain-oriented electrical steel sheet and method of manufacturing the same |
| 05/28/1997 | EP0694082B1 Method for removing sulfur from superalloy articles to improve their oxidation resistance |
| 05/13/1997 | US5628837 Cutting tool |
| 05/02/1997 | EP0770148A1 Method of making semi-finished metal products |
| 04/15/1997 | US5620533 Hot rolling steel slab of controlled composition and surface oxide content, cold rolling sheet, decarburization annealing in oxidizing atmosphere with controlled ratio of steam partial pressure to hydrogen partial pressure |
| 04/03/1997 | WO1997011809A2 Process for removing graphite from the surface area of a workpiece and the workpiece thus obtained |
| 03/12/1997 | EP0761827A2 Process for producing grain oriented silicon steel sheet, and decarburized sheet |
| 03/11/1997 | US5609447 Surface decarburization of a drill bit |
| 01/08/1997 | EP0752480A1 A method for making grain-oriented silicon steel sheet having excellent magnetic properties |
| 01/01/1997 | CN1139154A Method for manufacturing grain orientational silicon steel sheet with fine magnetic property |
| 12/24/1996 | US5587027 Metal working, decarbonization by annealing to reduce carbon content |
| 12/18/1996 | CN1138107A High flux density low iron loss grain orientation electromagnetic steel plate and its manufacture method |
| 11/20/1996 | EP0743370A2 Grain oriented electrical steel having high volume resistivity and method for producing same |
| 11/07/1996 | WO1996034719A1 Welding of a carbon steel and a strongly alloyed steel without metal deposition |
| 11/06/1996 | EP0741191A2 A magnetic steel sheet having excellent magnetic characteristics and blanking performance |