| Patents for C21D 3 - Diffusion processes for extraction of non-metals; Furnaces therefor (566) |
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| 05/16/1989 | US4830930 Surface-refined sintered alloy body and method for making the same |
| 03/08/1989 | EP0305966A1 Method for producing grain-oriented electrical steel sheet having metallic luster and excellent punching property |
| 02/09/1989 | DE3725175A1 Process for the decarbonising annealing of metal parts |
| 12/27/1988 | US4793873 Coating with magnesium oxide, high temperature annealing, removal of boron using group six compounds |
| 12/07/1988 | EP0294134A2 Manufacture of ductile high-permeability grain-oriented silicon steel |
| 11/02/1988 | EP0288661A1 Method for the selective decarborization of ferrous alloys |
| 10/05/1988 | EP0285128A2 Manufacturing method for high hardness member |
| 05/03/1988 | CA1235925A1 Method for quantitatively detecting the decarburization reaction in the production process of an electrical steel sheet |
| 08/26/1987 | EP0233659A1 Steel wire for reinforcing elastomer articles |
| 06/16/1987 | EP0225619A2 Grain-oriented electrical steel sheet having improved glass film properties and low watt loss and a process for producing same |
| 03/03/1987 | US4647319 Measuring absorption of an electromagnetic wave beam |
| 12/30/1986 | EP0205483A1 Method for the compensation of the initial adjustment of members subjected to mechanical wear |
| 07/03/1986 | WO1986003859A1 Method for the compensation of the initial adjustment of members subjected to mechanical wear |
| 07/02/1986 | CA1206854A Gaseous decarburizing mixtures of hydrogen, carbon dioxide and a carrier gas |
| 05/27/1986 | CA1204944A1 Processed ferrous metal and process of production |
| 03/18/1986 | US4576658 Hor eollinf, awrrinf, xols eollinf, annealingf, decarbonization, crystallization |
| 01/14/1986 | US4564402 Method for preventing disbonding of weld-cladding |
| 08/14/1985 | EP0151479A2 Control assembly |
| 07/10/1985 | EP0147659A2 Method for manufacturing grain-oriented silicon steel sheet |
| 06/25/1985 | CA1189427A1 Method for postweld heat treatment |
| 02/05/1985 | US4497671 High water vapor decarburization of steel scraps |
| 10/09/1984 | US4475963 Method for postweld heat treatment |
| 05/22/1984 | US4450017 Treatment of thin sheet steel used for electrical motors and transformers |
| 04/24/1984 | US4444599 Ionizing radiation |
| 01/24/1984 | US4427460 Decarburizing low carbon steel |
| 12/21/1983 | EP0096104A1 Process for producing a gas atmosphere that contains nitrogen and hydrogen |
| 11/08/1983 | US4414043 To methane and water |
| 08/10/1983 | EP0085136A2 Processed ferrous metal and process of production |
| 06/07/1983 | US4386972 Injection of a mixture of nitrogen, natural gas, and air |
| 12/07/1982 | US4362582 Method of producing microporous joints in metal bodies |
| 07/13/1982 | CA1127511A1 Processing for electromagnetic silicon steel |
| 04/27/1982 | US4326899 Method of continuous annealing low-carbon electrical sheet steel and duplex product produced thereby |
| 04/20/1982 | US4325752 Method for making shadow masks |
| 04/14/1982 | EP0049488A1 Method of and apparatus for decarburizing or neutrally annealing metal workpieces |
| 08/25/1981 | US4285742 Heat treatment method |
| 08/19/1981 | EP0034057A2 Method for postweld heat treatment |
| 06/23/1981 | CA1103593A1 Method and apparatus for removing gases from particles |
| 05/19/1981 | US4268326 Two-stage decarburization, specific water and hydrogen partial pressures |
| 02/10/1981 | US4249963 Method for improving a property of an alloy |
| 07/08/1980 | US4211584 Adding an acyclic hydrocarbon to the nitrogen or nitrogen-hydrogen atmosphere |
| 05/06/1980 | US4201600 Method for the gas carburization of workpieces made of steel |
| 04/29/1980 | US4200477 Processing for electromagnetic silicon steel |
| 01/22/1980 | CA1070223A1 Subscale reaction strengthening of low carbon ferrous metal stock |
| 11/27/1979 | US4175921 Apparatus for removing gases from particles |
| 11/06/1979 | US4173500 Process for producing porous cast iron |
| 07/03/1979 | US4159918 Alloying, hot rolling, annealing |
| 06/26/1979 | CA1057173A1 Processing for cube-on-edge oriented silicon steel |
| 06/19/1979 | US4158561 Decarburization of ferrous alloy |
| 05/08/1979 | US4153485 Deoxidizing |
| 02/20/1979 | US4140550 Decarbonization |
| 01/30/1979 | CA1047372A1 Method for forming an insulating glass film on a grain-oriented silicon steel sheet having a high magnetic induction |
| 09/26/1978 | CA1039160A1 Methods of heat-treating steel |
| 08/22/1978 | CA1036914A1 Plastically deformed hardened steel parts and method of forming same |
| 09/27/1977 | US4050960 Method for decreasing the amount of carbon and nitrogen contained in the ferrochrome alloy |
| 05/17/1977 | US4023990 Dynamo or electro band |
| 03/15/1977 | US4012239 Process for treating steel sheets for the purpose of enamelling the sheets |
| 02/15/1977 | US4008104 Method for dephosphorization and denitrification of an alloy containing easily oxidizable components |
| 02/08/1977 | US4007064 Process of producing surface-decarburized steel sheets or plates |
| 12/28/1976 | US4000017 Low alloy steel |
| 12/28/1976 | US4000015 Processing for cube-on-edge oriented silicon steel using hydrogen of controlled dew point |
| 12/21/1976 | US3998666 Subscale reaction strengthening of low carbon ferrous metal stock |
| 05/25/1976 | US3959029 Aluminum, multistage, hot rolling, annealing |
| 04/13/1976 | US3950191 Cold rolled steel sheets having an excellent enamelability and a method for producing said cold rolled steel sheets |
| 02/17/1976 | US3939013 Process for producing rimmed enameling steel |
| 01/13/1976 | US3932235 Method of improving the core-loss characteristics of cube-on-edge oriented silicon-iron |
| 01/06/1976 | US3930906 Method for forming an insulating glass film on a grain-oriented silicon steel sheet having a high magnetic induction |