| Patents for C21D 3 - Diffusion processes for extraction of non-metals; Furnaces therefor (566) |
|---|
| 11/05/1996 | US5571342 Decarburized steel sheet for thin oriented silicon steel sheet having improved coating/magnetic characteristics and method of producing the same |
| 10/31/1996 | WO1996034118A1 Method of making semi-finished metal products |
| 10/24/1996 | DE19514889A1 Verfahren zur Herstellung metallischer Halbzeuge A method for producing metallic semi-finished |
| 09/04/1996 | EP0730039A1 Magnesia coating and process for producing grain oriented electrical steel for punching quality |
| 08/29/1996 | CA2169914A1 Magnesia coating and process for producing grain oriented electrical steel for punching quality |
| 08/28/1996 | CN1129741A Method and apparatus for decarbonizing granular iron of blast furnace |
| 08/20/1996 | US5547519 Magnesia coating and process for producing grain oriented electrical steel for punching quality |
| 07/03/1996 | CN1032223C Controlling oxygen content in tantalum material |
| 07/02/1996 | US5532746 Bit allocation method for controlling transmission rate of video encoder |
| 06/12/1996 | EP0716151A1 High magnetic flux denscity, low iron loss, grainoriented electromagnetic steel sheet and a method for making |
| 06/06/1996 | CA2164466A1 High magnetic density, low iron loss, grainoriented electromagnetic steel sheet and a method for making |
| 05/01/1996 | EP0709470A1 Production method of directional electromagnetic steel sheet of low temperature slab heating system |
| 03/20/1996 | CN1118814A Method for making steel plate with good working performence |
| 03/12/1996 | US5498299 Oxidation resistance in carbon gas mixture with hydrogen and nitrogen to prevent formation of oxides of manganese or chromium |
| 01/31/1996 | EP0694083A1 Method for removing sulfur from superalloy articles to improve their oxidation resistance |
| 01/31/1996 | EP0694082A1 Method for removing sulfur from superalloy articles to improve their oxidation resistance |
| 01/10/1996 | EP0690758A1 Surface decarburization of a drill bit having a refined primary cutting edge |
| 12/05/1995 | US5472521 Production method of grain oriented electrical steel sheet having excellent magnetic characteristics |
| 12/05/1995 | US5472520 Measuring and adjusting current density during electrolytic degreasing of steel prior to annealing |
| 09/20/1995 | EP0672758A1 Method of manufacturing canning steel sheet with non-aging property and superior workability |
| 08/11/1995 | CA2141770A1 Atmospheres for decarburize annealing steels |
| 07/12/1995 | EP0662525A1 Process for preventing surface oxidation during steel carburizing |
| 06/28/1995 | EP0659892A1 Method of controlling oxygen deposition during decarburization annealing on steel sheets |
| 05/26/1995 | WO1995013894A1 Surface decarburization of a drill bit having a refined primary cutting edge |
| 05/26/1995 | CA2153881A1 Surface decarburization of a drill bit having a refined primary cutting edge |
| 05/18/1995 | WO1995013401A1 Production method of directional electromagnetic steel sheet of low temperature slab heating system |
| 05/11/1995 | WO1995012691A1 Manufacture of silicon steel plate having excellent magnetic characteristic |
| 05/03/1995 | EP0651061A1 Process for producing grain-oriented electrical strips and magnetic cores produced therefrom |
| 04/19/1995 | EP0648847A1 Production method of grain oriented electrical steel sheet having excellent magnetic characteristics |
| 03/28/1995 | US5401339 Atmospheres for decarburize annealing steels |
| 02/08/1995 | CN1098440A Production of grain-oriented magnetic steel plate with improved loss of remagnetization |
| 10/27/1994 | WO1994024320A1 Method for removing sulfur from superalloy articles to improve their oxidation resistance |
| 10/27/1994 | WO1994024319A1 Method for removing sulfur from superalloy articles to improve their oxidation resistance |
| 10/12/1994 | EP0619376A1 Method for manufacturing grain oriented electrical sheets with improved core loss |
| 09/13/1994 | US5346563 Heat treatment |
| 09/06/1994 | US5344510 Method for removing sulfur from superalloy articles to improve their oxidation resistance |
| 07/28/1994 | DE4311151C1 Grain-orientated electro-steel sheets with good properties |
| 07/20/1994 | EP0606884A1 Grain-oriented electrical steel sheet with very low core loss and method of producing the same |
| 06/08/1994 | EP0600181A1 Method for producing regular grain oriented electrical steel using a single stage cold reduction |
| 04/26/1994 | US5306353 Increasing magnetic flux density |
| 02/22/1994 | US5288736 Coating a magnesium oxide protective coatings with magnesium surfate on surfaces to maintain surfur concentration |
| 12/14/1993 | US5269853 Decarburized steel sheet for thin oriented silicon steel sheet having improved coating/magnetic characteristics and method of producing the same |
| 11/30/1993 | US5266129 Process for production of oriented electrical steel sheet having excellent magnetic properties |
| 11/18/1993 | EP0516763A4 Deoxidation of a refractory metal |
| 10/19/1993 | US5254180 Annealing of carbon steels in a pre-heated mixed ambients of nitrogen, oxygen, moisture and reducing gas |
| 07/13/1993 | CA1320108C Process for preparation of grain-oriented electrical steel sheet having excellent magnetic and film characteristics |
| 06/09/1993 | EP0545069A1 Method of treating steel and refractory metals |
| 06/09/1993 | DE4224264C1 Remelting of workpiece surface - by reducing carbon@ content in parts where remelting will not occur and directing an arc, electron, plasma or laser beam onto the surface |
| 06/01/1993 | US5215603 Measuring the grain diameter, calibration and controlling the diameter for stabilizing the product magnetic flux at high density |
| 05/18/1993 | US5211775 Removal of oxide layers from titanium castings using an alkaline earth deoxidizing agent |
| 05/05/1993 | EP0540382A1 Steel sheet suitable for drawing and method of producing the same |
| 03/31/1993 | EP0534432A2 Process for production of oriented electrical steel sheet having excellent magnetic properties |
| 03/16/1993 | US5194096 Carburizing treatment of a steel with reduction of the hydrogen content in the carburized layer |
| 03/09/1993 | US5192373 Adding magnesium, calcium, sodium and/or potassium chloride to seal surface during anneal to control grain growth inhibitors |
| 02/24/1993 | CN1069288A Method of producing grain-oriented electrical steel sheets or strips |
| 02/09/1993 | US5185044 Solidifying steel melt to form ingot, heating, enclosing in malleable envelope, shaping at two specified temperatures, removing envelope |
| 12/09/1992 | EP0516763A1 Deoxidation of a refractory metal |
| 11/19/1992 | EP0513729A1 Process for producing grain-oriented electrical steel sheets |
| 11/18/1992 | CA2068592A1 Method of producing grain-oriented electrical steel sheets or strips |
| 06/03/1992 | EP0488726A2 Thin decarburized grain oriented silicon steel sheet having improved coating and magnetic characteristics |
| 05/26/1992 | US5116469 Method for treatment of high-strength metal against hydrogen embrittlement |
| 05/05/1992 | US5110543 Cement blade member for cutting-tools and process for producing same |
| 04/22/1992 | EP0480924A1 Process for case-hardening roller bearing components of low-alloy nickel steel |
| 04/15/1992 | EP0479886A1 Carburising treatment of a steel with reduction of the hydrogen content in the carburized layer |
| 12/03/1991 | US5069728 Process for heat treating metals in a continuous oven under controlled atmosphere |
| 11/05/1991 | US5062905 Method of producing non-oriented magnetic steel plate having high magnetic flux density |
| 10/22/1991 | US5059491 Cermet blade member for cutting-tools and process for producing same |
| 10/16/1991 | EP0452122A2 Method of producing grain oriented silicon steel sheets having less iron loss |
| 09/17/1991 | US5049205 Decarburization, nitriding |
| 08/23/1991 | WO1991013182A1 Deoxidation of a refractory metal |
| 08/23/1991 | CA2075922A1 Deoxidation of a refractory metal |
| 08/06/1991 | US5037493 Method of producing non-oriented magnetic steel plate having high magnetic flux density and uniform magnetic properties through the thickness direction |
| 07/02/1991 | US5028279 Roughening the surface, glass adheres to oxide layer which partially protrudes into steel sheet |
| 06/11/1991 | US5022935 With a metal, heating to liquify deoxidant, cooling, purification of surface |
| 05/14/1991 | US5014760 Steel wire for reinforcing elastomer articles with improved adhesion promoting layer |
| 04/30/1991 | US5011742 Article for controlling the oxygen content in tantalum material |
| 04/30/1991 | US5011548 Composition for deboronizing grain-oriented silicon steel |
| 04/10/1991 | CN1050563A Controlling oxygen content in tantalum material |
| 04/03/1991 | EP0420238A2 Process for preparing unidirectional silicon steel sheet having high magnetic flux density |
| 03/13/1991 | EP0416420A2 Magnesium oxide coating for electrical steels and the method of coating |
| 02/20/1991 | EP0413306A1 Method of producing non-oriented magnetic steel plate having high magnetic flux density |
| 01/24/1991 | WO1991000929A1 Process for case-hardening roller bearing components of low-alloy nickel steel |
| 01/10/1991 | WO1991000367A1 Carburising treatment of a steel with reduction of the hydrogen content in the carburized layer |
| 01/02/1991 | EP0406047A1 Process for heat-treating of metals |
| 12/31/1990 | CA2020077A1 Metal thermal processing |
| 12/25/1990 | US4979997 Heating, cold rolling, hot rolling, decarburization, and annealing |
| 12/25/1990 | US4979996 Low temerpature heating, nitriding runnign strip |
| 12/05/1990 | EP0400549A2 Process for producing grainoriented electrical steel sheet having superior magnetic and surface film characteristics |
| 10/02/1990 | US4960471 Heating in hydrogen with encapsulated getter metal |
| 09/26/1990 | EP0388776A1 Method of producing non-oriented magnetic steel plate having high magnetic flux density and uniform magnetic properties through the thickness direction |
| 08/21/1990 | US4950336 Hot rolling, dehydrogenation, annealing |
| 07/18/1990 | EP0378131A2 A method of manufacturing a grain-oriented electrical steel strip |
| 05/16/1990 | EP0368336A2 Cermet blade member for cutting-tools and process for producing same |
| 04/03/1990 | US4913749 Process for case-hardening rolling bearing elements of low-alloy nickeliferous steel |
| 01/30/1990 | US4897131 Grain-oriented electrical steel sheet having improved glass film properties and low watt loss |
| 01/10/1990 | EP0349853A2 Method of producing non-oriented magnetic steel heavy plate having high magnetic flux density |
| 12/05/1989 | US4885043 Method for selective decarburization of iron based material |
| 11/02/1989 | EP0339474A1 Process for preparation of grain-oriented electrical steel sheet having excellent magnetic and film characteristics |
| 10/24/1989 | US4875947 Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property |
| 08/08/1989 | US4854978 Heat treatment to volatilize high vapor pressure elements |