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| Number | Title | Issue Date |
| 7435304 | Coating composition, and method for manufacturing high silicon electrical steel sheet using thereof There are provided a coating composition for siliconizing, and a method for manufacturing a high silicon electrical steel sheet using the same. The coating composition includes: a Fe—Si-based composite compound sintered powder having a grain size of −325 mesh an... | 10/14/2008 |
| 7311786 | Passivation of sulfidic iron-containing rock A method for passivating sulfidic iron-containing rock comprising: contacting sulfidic iron-containing rock with a magnesium-containing substance, a manganese-containing substance, and a calcium-containing substance; and adjusting the pH of the system to below about... | 12/25/2007 |
| 7276209 | Air-gas mixing systems and methods for endothermic gas generators Systems and methods create an air-gas mixture supply for an endothermic generator. The systems and methods convey a hydrocarbon gas under pressure through a valve, to thereby form an air-gas mixture supply for the endothermic generator. The systems and methods sense... | 10/02/2007 |
| 7008606 | Process for passivating sulfidic iron-containing rock A method is provided for passivating sulfidic iron-containing rock comprising contacting sulfidic iron-containing rock with one or more members of the group consisting of magnesium oxide, magnesium hydroxide, magnesium chloride, magnesium nitrate and magnesium carbo... | 03/07/2006 |
| 6899768 | Magnesium oxide particle aggregate The present invention is related to a magnesium oxide particle aggregate with the requirement of a first inflection point diameter is more than 0.30×10−6 to 0.60×10−6 m, a particle void volume is 0.50×10−3 to 0.90×10âˆ... | 05/31/2005 |
| 6835250 | Magnesium oxide particle aggregate An object of the present invention is to provide a magnesium oxide particle aggregate having a controlled particle aggregation structure so that the solid phase-solid phase reaction between magnesium oxide and the SiO2 film on the surface can be appropria... | 12/28/2004 |
| 6554609 | Nanotechnology for electrical devices Nanostructured non-stoichiometric non-equilibrium materials are disclosed. Novel electromagnetic materials and their applications are discussed. More specifically, the specifications teach the use of nanotechnology and nanostructured materials for develop... | 04/29/2003 |
| 6074494 | Surface nitriding method of an aluminum material, and an auxiliary agent for nitriding This invention aims to provide a nitriding method of forming a relatively thick nitride layer on the surface of an aluminum material containing silicon, and an auxiliary agent for nitriding. By using a nitriding auxiliary agent mainly comprising aluminum ... | 06/13/2000 |
| 5685920 | Annealing separator having excellent reactivity for grain-oriented electrical steel sheet and method of use the same Disclosed is an annealing separator for production for grain-oriented electrical steel sheet, containing one or more compound selected from the following general formula; ›Mg1-x M3+x !O ›Mg1-x M2+x | 11/11/1997 |
| 5629251 | Ceramic coating-forming agent and process for the production thereof A ceramic coating-forming agent of an Mg-M3+ -O based two-component oxide solid solution capable of forming a ceramic coating excellent in heat resistance, adhesion to a substrate metal, electric insulation and the properties of low thermal exp... | 05/13/1997 |
| 5453109 | Method for the preparation of a hardening salt in piece form and product A method for the preparation of a salt mixture useful for hardening steel parts, including of potassium cyanate, potassium carbonate and sodium carbonate, wherein 2.2 to 2.3 moles of urea is first reacted with 1 mole of potassium carbonate to form potassi... | 09/26/1995 |
| 5364476 | Industrial variable carbon potential gas generator A variable gas generator is disclosed which is capable of producing a wide variety of product gas compositions heretofore produced only by either exothermic gas generators or endothermic gas generators or a combination of gas generators. The variable gas ... | 11/15/1994 |
| 5330813 | Patch for preventing carburization, nitriding or oxidation, and method of preventing carburization, nitriding or oxidation A patch for preventing carburization, nitriding or oxidation comprises: a film comprising a heat-fusible or heat-meltable particulate material having an anti-carburizing, anti-nitriding or anti-oxidizing effect and a heat-decomposable resin as a binder; and a ... | 07/19/1994 |
| 5192373 | Magnesium oxide coating for electrical steels and the method of coating Decarburized grain oriented silicon steel is provided with an annealing separator which forms a glass film after the final high temperature anneal. The magnesia used as the annealing separator has a total chlorine level of 0.01 to 0.20% by weight based on... | 03/09/1993 |
| 5173124 | Rapid gas quenching process Increased cooling rate of an article heated to an elevated temperature is achieved by flowing an inert gas mixture of helium and another inert gas over the article under conditions of turbulent flow.... | 12/22/1992 |
| 5022935 | Deoxidation of a refractory metal A process for the deoxidation of a refractory metal containing minor concentrations of oxygen is disclosed. In this process the refractory metal is contacted with a metallic deoxidant in a dry, inert atmosphere. The metallic deoxidant and the refractory m... | 06/11/1991 |
| 5011548 | Composition for deboronizing grain-oriented silicon steel For making a ductile boron-containing grain-oriented silicon steel, there is practiced, at a late stage in the making of the product either during the final texture anneal or a subsequent anneal, a high-temperature anneal in a reducing atmosphere with the... | 04/30/1991 |
| 4810532 | Boron-silicon-hydrogen alloy films Hydrogenated boron-silicon alloy films having unexpected properties permitting in one embodiment the bonding together of metal and ceramic substrates by coating the surfaces to be bonded with the film mating the surfaces and heat treating the mated surfac... | 03/07/1989 |
| 4775430 | Process for producing grain-oriented electrical steel sheet having improved magnetic properties For improving the properties of a glass film on a grain-oriented electrical steel sheet, the annealing separator applied on a decarburized steel sheet is prepared by: calcining at a high temperature to reduce the activity thereof; hydrating only on the ou... | 10/04/1988 |
| 4762753 | Insulative coating composition A coating composition is disclosed consisting essentially of sodium silicate, magnesium oxide or magnesium hydroxide, titanium oxide and mica. Coatings from this composition are useful as electrically insulating coatings, particularly as applied to electr... | 08/09/1988 |
| 4746376 | Method of preventing diffusion of N2, O2 or C in selected metal surfaces A method and composition for stopping-off nitrogen and/or carbon diffusion into metal surfaces. The composition, which is a mixture of a refractory material selected from the group of zirconium and aluminosilicate, sodium silicofluoride and sodium silicat... | 05/24/1988 |
| 4740251 | Method for improving magnesium oxide steel coatings This invention is directed to improved magnesium oxide slurries for use in coating silicon steels prior to high temperature annealing, comprising a calcination-modified magnesium oxide and water. Inorganic salts of barium, chromium, silicon, zinc or alumi... | 04/26/1988 |
| 4666535 | Method of producing low core losses in oriented silicon steels A method is provided for improving core-loss values of grain-oriented silicon steel after final texture annealing by boronizing the steel to levels of 0.001 to 0.009 wt. % after applying a boron-containing material to the final texture annealed steel, hea... | 05/19/1987 |
| 4647318 | Solution heat treatment for aluminum alloys A method of solution heat treating aluminum alloys, especially aluminum-lithium alloys, by immersing the alloy article in a chloride based neutral salt bath rather than in the conventionally used nitrate based salt bath. A chloride based bath, at least in... | 03/03/1987 |
| 4632708 | Annealing separator used in the finishing annealing step for producing a grain-oriented electrical steel sheet An annealing separator used in a finishing annealing step for producing a grain-oriented electrical steel sheet usually contains magnesia. The present invention is characterized by including, based on 100 parts by weight of magnesia, from 0.2 to 20 parts ... | 12/30/1986 |
| 4595425 | Corrosion inhibiting quenchant compositions An organic polymer containing composition suitable for use as a quenchant having incorporated therein a non-nitrite inhibitor system, which comprises an aromatic compound having at least one substituent nitro group and/or the water soluble organic or inor... | 06/17/1986 |
| 4591397 | Non-cyanide salt bath and process for carburization of ferrous metals and alloys A non-cyanide molten salt bath composition and process for the carburization of objects made of ferrous metals or alloys are provided. The composition comprises a molten salt mixture, at a temperature in the range of 900° C. to 1050° C., of an alkali me... | 05/27/1986 |
| 4582547 | Method for improving the annealing separator coating on silicon steel and coating therefor A method for producing an annealing separator coating on grain oriented silicon steel prior to final texture annealing to improve the coating uniformity and prevent oxidation of the steel surface during this annealing operation. The method comprises coati... | 04/15/1986 |
| 4571273 | Process of heating and cooling charges in batch-process industrial furnaces In a process of heating and cooling charges in batch-process industrial furnaces, particularly in a process of cooling coils of steel wire or strip steel in bell-type annealing furnaces, the charge is heated and cooled in contact with circulated protectiv... | 02/18/1986 |
| 4543134 | Process for producing grain-oriented electrical steel sheet having both improved magnetic properties and properties of glass film The present invention provides an annealing separator comprising from 0.05 to 2.0 parts by weight of antimony sulfate based on 100 parts by weight of magnesium oxide, and at least one chloride selected from the group consisting of Sb, Sr, Ti, and Zr chlor... | 09/24/1985 |
| 4539053 | Pack composition for carburosiliconizing ferrous substrates A pack composition is disclosed for case hardening a ferrous metal to initially diffuse boron into the surface thereof and subsequently diffuse boron and silicon into the surface thereof. The pack composition comprises an amorphous boron, a silicon materi... | 09/03/1985 |
| 4537792 | Method of applying an annealing separator to grain oriented magnetic steel sheets A water repellent, for example an organic silicon compound, is added to an annealing separator which is applied electrostatically to the surface of a grain oriented magnetic steel sheet, or a glass-like film forming undercoating formed on the sheet surfac... | 08/27/1985 |
| 4533403 | Pack composition for borocarburizing ferrous substrates A pack composition is disclosed for case hardening a ferrous metal to initially diffuse carbon into the surface thereof and subsequently diffuse boron into the surface. The pack composition comprises a boron material and a carburizing compound with the la... | 08/06/1985 |
| 4509993 | Regeneration agent for carburization salt bath It is known to regenerate salt baths for nitriding parts of iron and steel with polymers of organic materials, which polymers, however, could not be used in carburizing salt baths since with them there only are formed slight amounts of carburizing active ... | 04/09/1985 |
| 4496399 | Method and aqueous coating compositions for forming anti-stick and insulative coatings on semi-processed and fully-processed electrical steels A method and aqueous coating composition for forming an anti-stick and insulative coating on cold-rolled, non-oriented, semi-processed steel; cold-rolled, non-oriented, fully-processed steel; cold-rolled motor lamination steel; and punching quality orient... | 01/29/1985 |
| 4473412 | Annealing steel strip using molten B2 O3, SiO2 Na2 O, NaF glass bath A process for annealing steel strip comprising dipping the strip in a molten glass bath maintained 950° C. or higher to anneal it, taking the strip out of the bath to form coagulated glass coatings on the surfaces of the strip and cooling the strip to de... | 09/25/1984 |
| 4457788 | Particulate medium for fluidized bed operations This invention relates to non-abrasive, lubricative, particulate solids, e.g. graphites, lime, calcium oxides, zinc oxides and compounds of higher saturated fatty acids, particularly, stearate salts, and their methods of use as fluidized bed media for pre... | 07/03/1984 |
| 4455251 | Aqueous solution of alkali metal compositions According to the present invention a saturated aqueous solution comprising at least one alkali metal hydroxide and at least one alkali metal nitrate is provided which can be spray added to a fused anhydrous bath which contains alkali metal materials.... | 06/19/1984 |
| 4443425 | Magnesium oxide composition for coating silicon steel The instant invention is directed to a magnesium oxide composition, for use in coating silicon steel, having a Citric Acid Activity of 50 to 200 seconds and a particle size of 90 percent finer than 325 mesh prepared from a blend of (a) ground magnesium ox... | 04/17/1984 |
| 4441937 | Quenching bath and quenching method for metals Bath for the quenching of ferrous and nonferrous metals and their alloys, comprising a hydrogenated starch hydrolysate having, expressed with respect to the dry matter, a percentage of products of degree of polymerization 1 and 2 comprised between 1 and 9... | 04/10/1984 |
