Carbonaceous Patents (Class 148/30)
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Patent number: 7658995Abstract: A nickel powder exhibits superior oxidation behavior, reduction behavior and sintering behavior in a production process for a multilayer ceramic capacitor and is suitable for the capacitor; a production method therefor is also provided. The nickel powder, which may be used as a raw material, is treated with a sulfur-containing compound, and the sulfur-containing compound is coated on the surface thereof, or alternatively, a nickel-sulfur compound layer is formed on the surface thereof.Type: GrantFiled: June 13, 2005Date of Patent: February 9, 2010Assignee: Toho Titanium Co., Ltd.Inventor: Mitsugu Yoshida
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Patent number: 4979998Abstract: A process to form a uniform metal boride coating on a carbonaceous substrate by first forming a metal carbide coating and reacting the carbide coating with a boron compound.Type: GrantFiled: October 10, 1989Date of Patent: December 25, 1990Assignee: Union Carbide CorporationInventors: Ching F. Chang, Raymond V. Sara
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Patent number: 4810532Abstract: 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 surfaces to expell hydrogen therefrom and to react to resulting boron-silicon alloy film with the substrates to form a liquid reaction product which forms a surface bond with the substrates or is at least partially absorbed in the substrates. In another embodiment, at least one surface of an intermetallic compound formed from elements selected from groups III and V of the periodic table is sealed against structural degradation by forming on the surface a solid boron-silicon-hydrogen alloy film. In still another embodiment, metal and organic resin substrates are protected against attack by water vapor, dissociated oxygen and molecular oxygen by forming a solid boron-silicon-hydrogen alloy film on the substrates.Type: GrantFiled: May 31, 1988Date of Patent: March 7, 1989Assignee: Lockheed Missiles & Space Company, Inc.Inventors: Henry W. Lavendel, John C. Robinson
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Patent number: 4596612Abstract: A metal quenchant fluid which is a mixture of water and a polyalkylene glycol and a inhibitor is substantially nitrite free. The inhibitor is a soluble product obtained by mixing a carboxylic acid having 4 to 12 carbon atoms in the molecule, an amine such as an alkanolamine boiling above 150.degree. C. at atmospheric pressure and a copper chelating agent such as NN diethanol methylene benzotriazole.Type: GrantFiled: October 22, 1984Date of Patent: June 24, 1986Assignee: BP Chemicals LimitedInventor: Manuel Fradique
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Patent number: 4561912Abstract: Fluxes for use in the casting of metals e.g. steel comprise granules containing carbonaceous powder in which the proportion of carbonaceous powder in the surface of the granules is greater than the overall proportion of carbonaceous powder in the granules. The fluxes are particularly suitable for use in the continuous casting of steel.Type: GrantFiled: September 7, 1984Date of Patent: December 31, 1985Assignee: Foseco International LimitedInventors: John H. Courtenay, Royston J. Phillips
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Patent number: 4539053Abstract: 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 material, an alkyli earth, and a carbon bearing compound with the last named compound including a barium carbonate, a calcium carbonate and a hardwood charcoal and coke mixture.Type: GrantFiled: August 27, 1984Date of Patent: September 3, 1985Assignee: Dresser Industries, Inc.Inventor: William L. Aves, Jr.
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Patent number: 4533403Abstract: 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 last named compound including a barium carbonate, a calcium carbonate and a hardwood charcoal and coke mixture.Type: GrantFiled: September 17, 1984Date of Patent: August 6, 1985Assignee: Dresser Industries, Inc.Inventors: William L. Aves, Jr., Gary A. Aves
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Patent number: 4509993Abstract: 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 cyanide, the baths foam, and carbon residues are formed. An excellent regeneration agent for carburizing salt baths is obtained by using polymeric organic compounds of the overall composition [C.sub.6 H.sub.x N.sub.y ].sub.z where x is 3 to 5, y is 5 to 8, and z is 10 to 10,000. These compounds are obtained by reacting formaldehyde with cyanamide and/or dicyandiamide and/or melamine and pyrolytically decomposing the reaction product at 300.degree. to 600.degree. C.Type: GrantFiled: December 29, 1983Date of Patent: April 9, 1985Assignee: Degussa AktiengesellschaftInventors: Hans-Hermann Beyer, Ulrich Baudis, Peter Biberbach
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Patent number: 4465523Abstract: A method of quenching metals is described, comprising immersing said metals in a quenching oil composition comprising: (a) a base oil, and (b) a compound represented by the general formula (1) or (2) as described below. ##STR1## (wherein all the symbols are the same as defined in the claims). The use of the quenching oil composition results in the formation of a black coating layer on the metal, producing those metallic articles having improved characteristics, such as good lubricity and rust preventive properties.Type: GrantFiled: April 11, 1983Date of Patent: August 14, 1984Assignee: Idemitsu Kosan Company LimitedInventor: Tadashi Katabuchi
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Patent number: 4457788Abstract: 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 preventing clinging and related carryover problems. Preferably, fluidized bed media, selected in accordance with this invention, have a beneficial effect on subsequent process operations.Type: GrantFiled: March 1, 1982Date of Patent: July 3, 1984Assignee: Procedyne Corp.Inventors: Herbert K. Staffin, Robert Staffin
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Patent number: 4441937Abstract: 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 90, the complement to 100 being constituted by products of degree of polymerization equal to or higher than 3.Type: GrantFiled: July 20, 1983Date of Patent: April 10, 1984Assignee: Roquette FreresInventors: Serge Gosset, Michael Huchett
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Patent number: 4268323Abstract: A process for case hardening steel is described. A fused bath of inert salt is maintained which bath is comprised of alkali or alkali earth halides, and alkali, or alkaline earth oxides or carbonates. To this fused bath is added urea, dicyanodiamide or pyrolysis/condensation products of urea or dicyanodiamide. This will form active ions containing carbon and/or nitrogen, and either the nitrogen and/or carbon will diffuse into the surface of a steel piece suspended in the bath to form either a nitride, carbonitride or carburized case depending upon the temperature of the bath, which is maintained between above 540.degree. C. and about 950.degree. C.Type: GrantFiled: July 1, 1980Date of Patent: May 19, 1981Assignee: Kolene Corp.Inventors: Thomas M. Jakubowski, William G. Wood
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Patent number: 3956028Abstract: A coating composition containing 75-95% MgO, 2-10% B.sub.2 O.sub.3 and 0-15% C, which is effective in retarding oxidation of ferrous metal articles, especially at temperatures in excess of 2150.degree.F. Additional protection is achieved when about 11-17% TiO.sub.2 is substituted for about the same amount of MgO. The composition is admixed with a suitable vehicle and is applied to the metal surface in the form of a dispersion, suspension or as a slurry.Type: GrantFiled: May 28, 1974Date of Patent: May 11, 1976Assignee: United States Steel CorporationInventors: William E. Boggs, William A. Linderman, Roland B. Snow