Metal Base Patents (Class 427/435)
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Patent number: 4735858Abstract: A heat-resistant prepreg uses at a substrate a heat-resistant material made of heat-resistant organic fibers, inorganic fibers, etc. and as a matrix a heat-resistant mixture containing at least 10% by weight of a borosiloxane resin composition. This heat-resistant prepreg is obtained by impregnating the substrate at a temperature in the range of 200.degree. to 300.degree. C. to such an extent that at least 20% of the amount of phenyl groups bonded to silicon atoms in the aforementioned borosiloxane resin composition prior to the impregnating and drying steps will remain after the heat treatment.Type: GrantFiled: July 18, 1986Date of Patent: April 5, 1988Assignee: Showa Electric Wire & Cable Co., Ltd.Inventors: Etsuo Hosokawa, Hiroshi Hashimoto
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Patent number: 4711822Abstract: Disclosed is a method of making a printed circuit board by exposing in a circuit pattern the polymeric surface of a conductive substrate coated with a polymer selected from the group consisting of polyimides, polyamide-imides, polyester-amide-imides, polysulfones, polyphenylene sulfides, and polyphenylene oxides, to an ion beam at an energy of about 50 KeV to about 2 MeV and a fluence of about 10.sup.15 to 10.sup.18 ions/cm.sup.2. The surface is then wet blasted and the portions of the polymeric surface that have been exposed to the ion beam are electrolessly plated with a metal such as nickel or copper. Also disclosed is a coated substrate comprising a metal or conductive surface and an imide polymeric coating on the surface which can be electrophoretically deposited, a portion of which has been exposed to an ion beam.Type: GrantFiled: January 15, 1986Date of Patent: December 8, 1987Assignee: Westinghouse Electric Corp.Inventors: Wolfgang J. Choyke, Susan Wood, Luciano C. Scala, Melvin P. Zussman, Leslie A. Doggrell, Janet S. Lauer
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Patent number: 4705703Abstract: A method for eliminating or reducing dome staining during the pasteurization of aluminum beverage cans involves the addition of zinc, orthophosphate, a zinc stabilizing polymer and, optionally, organophosphonate corrosion inhibitors and/or other known corrosion inhibitors. The zinc stabilizing polymer contains at least 25 weight percent acrylic acid, methacrylic acid, their water soluble salts, or admixtures thereof. These polymers may be homopolymers, copolymers, terpolymers, and above.Type: GrantFiled: June 30, 1986Date of Patent: November 10, 1987Assignee: Nalco Chemical CompanyInventors: Daniel A. Meier, Michael J. Groshans
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Patent number: 4693916Abstract: A method of depositing a silicon dioxide film by bringing a substrate into contact with a hydrosilicofluoric acid solution supersaturated with silicon dioxide by the addition of an additive to deposit silicon dioxide film on the surface of the substrate, wherein the additive is at least one compound selected from the group consisting of an aluminum compound, a calcium compound, a magnesium compound, a barium compound, a nickel compound, a cobalt compound, a zinc compound, and a copper compound, and/or a metal or metals.Type: GrantFiled: July 7, 1986Date of Patent: September 15, 1987Assignee: Nippon Sheet Glass Co., Ltd.Inventors: Hirotsugu Nagayama, Hisao Honda, Hideo Kawahara
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Patent number: 4692353Abstract: A method of inhibiting degeneration of direct reduced iron by immersing the iron ore, after it has been reduced, in molten wax for a period of time sufficient for the wax to cover completely the surface of the iron and to enter the pores in the surface of the iron.The iron is preferably in the form of pellets which are conveyed in mesh baskets which are themselves immersed in the wax.The wax is preferably paraffin wax at a temperature of between 110.degree. and 120.degree. C.Type: GrantFiled: January 3, 1984Date of Patent: September 8, 1987Assignee: Ministry of Industry & Minerals Specialized Institute for Engineering IndustriesInventor: Jaleel K. Ahmed
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Patent number: 4678685Abstract: The present invention relates to a method for obtaining a tenacious in-situ coating deposition of calcite on the inner surface of water pipes at very high rates. The calcite producing ingredients are supplied to the water stream in quantities supplementing concentrations available in the natural water used, giving the required supersaturation levels by addition of suitable salts to provide an aqueous lining solution supersaturated with respect to calcium carbonate containing dissolved calcium and carbonate ions. The method consists in maintaining the suspended calcium carbonate particles concentrations in the lining solution below 300 ppm, the excess suspended particles being removed by physical means. The calcite coating deposition according to the present invention has the advantage that it occurs at the rate of above 5 microns/h and even above 50 microns/h, maintaining a completely corrosion-free system during the coating. The method is applicable to lead pipes, cement mortar linings or asbestos pipes.Type: GrantFiled: September 11, 1985Date of Patent: July 7, 1987Assignees: Technion Research & Development Foundation, Ltd., Mekoroth Water Co.Inventors: David Hasson, Mordechai Karmon
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Patent number: 4675207Abstract: The invention relates to a process for the depositing on a substrate a thin film or layer of a compound having at least one cationic constituent C and at least one anionic constituent A, such as zinc sulphide.On the substrate are formed at least two superimposed ionic layers respectively incorporating the said cationic constituent or constituents C and the said anionic constituent or constituents A by successively immersing the substrate in a first solution e.g. containing a salt of C, such as zinc sulphate and in a second solution eg containing a salt of A, such as sodium sulphide, while rinsing the substrate between two immersion operations.Type: GrantFiled: August 13, 1985Date of Patent: June 23, 1987Assignee: Commissariat a l'Energie AtomiqueInventor: Yann F. Nicolau
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Patent number: 4661411Abstract: This invention discloses improved heterogeneous acid catalysts and a method for preparing these catalysts. A heterogeneous acid catalyst has been prepared by treating a carrier material with a solution containing a fluorocarbonsulfonic acid polymer dissolved in a suitable solvent, removing the solvent, and heat treating the coated carrier in such a way so as to prevent the polymer from being leached off the carrier. The final heat treatment of the composition to prevent the polymer from redissolving comprises an improvement in the preparation of a heterogeneous catalyst.Type: GrantFiled: February 25, 1986Date of Patent: April 28, 1987Assignee: The Dow Chemical CompanyInventors: Charles W. Martin, Bobby R. Ezzell, John D. Weaver
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Patent number: 4661385Abstract: A method for stabilizing the iron salt content of a PVDC latex autodeposition bath by: filtering a metered portion of the bath to separate it into a filtrate containing the iron salts and a retentate containing the latex and pigment particles; discarding the filtrate; recycling the retentate back into the bath; and adding D.I. water in a volume equal to that of the filtrate.Type: GrantFiled: June 4, 1985Date of Patent: April 28, 1987Assignee: Amchem Products, Inc.Inventor: Nestor M. Holyk
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Patent number: 4659629Abstract: A process is disclosed for the protection of magnesium based alloys containing aluminum by treatment with eutectic mixtures of fused salts to provide a corrosion resistant outer layer on the magnesium based alloy. A suitable fused salt mixture comprises urea and at least one of ammonium nitrate or ammonium nitrite. A magnesium based alloy is also disclosed comprising magnesium and aluminum having a corrosion resistant outer layer comprising magnesium oxide and aluminum oxide; the proportion of aluminum present in the outer layer being enriched in proportion to the amount present in the magnesium based alloy.Type: GrantFiled: November 25, 1985Date of Patent: April 21, 1987Assignee: The Dow Chemical CompanyInventors: Charles D. Gartner, Patrick L. Hagans
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Patent number: 4657788Abstract: A multiple stage autodeposition of organic polymer coating compositions deposited onto metal substrates wherein the coating composition's thickness does not increase by more than about 20.DELTA. compared to a single dry coating. The coated metal substrates formed by the process of the instant invention are corrosion resistant.Type: GrantFiled: March 31, 1986Date of Patent: April 14, 1987Assignee: The Standard Oil CompanyInventors: Kenneth C. Benton, Raymond J. Weinert, Jr.
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Patent number: 4657772Abstract: An introducer sheath includes a connector body having an inlet and an outlet; a flexible tube for intravenous use at the outlet, including a helical coiled spring having a plurality of coils, each coil spaced from an adjacent coil, and a thin cylindrical wall prepared from a protective coating composition completely surrounding the spring to define an inner and an outer wall surface, the portion of the cylindrical wall surrounding each coil having a first thickness and the portion of the cylindrical wall between the spaced coils having a second, smaller thickness, with the inner and outer wall surfaces being indented thereat, the coating composition comprising a thermoplastic polymeric material dissolved in a solvent solution, the composition having a solids content ranging from about 4% to about 18%, and said solution comprising a solvent selected from the group consisting of tetrahydrofuran, dioxane, methyl ethyl ketone, dimethylformamide, cyclohexane, and mixtures thereof, formed on a helical coiled springType: GrantFiled: July 15, 1986Date of Patent: April 14, 1987Inventor: Nuri Kocak
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Patent number: 4650692Abstract: Adding a combination of sterically hindered tertiary amines or derivatives, e.g. piperidine and derivatives, with overbased metal (e.g. calcium, magnesium, barium, zinc, etc.) sulfonate, wax and oxidized petrolatum solvent based rust preventative compositions dramatically increases weather and salt-fog protection.Type: GrantFiled: November 1, 1985Date of Patent: March 17, 1987Assignee: Ashland Oil, Inc.Inventor: Roger E. Hayner
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Patent number: 4647309Abstract: A waterbase coating composition for use in protecting the threads of metal studs during automotive production line phosphating, electrostatic painting and welding. Composition also provides controlled lubricity as well as even torque during the tightening sequency of fasteners by robotics.Type: GrantFiled: March 7, 1985Date of Patent: March 3, 1987Assignee: Ashland Oil, Inc.Inventor: Roger E. Hayner
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Patent number: 4647480Abstract: Curing of autodeposited coatings by treatment with water or steam including a solute.Type: GrantFiled: August 1, 1985Date of Patent: March 3, 1987Assignee: Amchem Products, Inc.Inventor: Bashir M. Ahmed
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Patent number: 4645692Abstract: Substrates are coated by heating the substrates to temperatures of 120.degree.-260.degree. C. and dipping them into a bath of polyvinyl fluoride dispersed in latent solvent at temperatures below 100.degree. C.Type: GrantFiled: February 20, 1986Date of Patent: February 24, 1987Assignee: E. I. Du Pont de Nemours and CompanyInventor: Eustathios Vassiliou
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Patent number: 4644029Abstract: A composition and method are particularly suitable for applying a corrosion preventive and paint receptive coating to metal surfaces where immersing treatment is impossible or impractical. A brush-on aqueous composition free of reducing agent containing hexavalent and trivalent chromium and at least 5 g/l of silica or silicate together with an organic solvent and thickening agent is applied to the metal surface and dried.Type: GrantFiled: September 9, 1985Date of Patent: February 17, 1987Assignee: Pyrene Chemical Services LimitedInventors: Jane Cable, George Higgins
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Patent number: 4637839Abstract: In a process wherein a resinous coating is formed on a metallic surface by immersing the surface in an acidic aqueous coating composition containing dispersed particles of resin, wherein said composition forms on said surface a resinous coating which increases in thickness the longer the surface is immersed in the composition and wherein the resinous coating is contacted with an aqueous solution containing Cr to improve properties of the resinous coating, the improvement comprising contacting said resinous coating with an acidic aqueous solution prepared by combining a hexavalent Cr-containing compound, an aqueous mixture of hexavalent chromium/reduced chromium, and an acid or a soluble salt thereof.Type: GrantFiled: September 4, 1981Date of Patent: January 20, 1987Assignee: Amchem Products, Inc.Inventor: Wilbur S. Hall
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Patent number: 4636265Abstract: A method of improving the anticorrosion properties of an autodeposited resin coating by including in the post-bath rinse (a) a metal dichromate, (b) a metal hypophosphite, or (c) a combination of either of the foregoing with a metal hydrogenphosphate, followed by curing.Type: GrantFiled: November 26, 1985Date of Patent: January 13, 1987Assignee: Henkel Kommanditgesellschaft auf AktienInventors: Herbert Fischer, Karl H. Stritzke, Roland Morlock, Thomas C. Jones, Joseph C. Donovan
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Patent number: 4636264Abstract: A process for increasing the anticorrosive properties of an autodeposited coating wherein after the bath but before the curing, metallic chromate salts are formed in situ by first rinsing with metallic non-chromate water soluble salts and then rinsing with a chromium compound.Type: GrantFiled: November 26, 1985Date of Patent: January 13, 1987Assignee: Gerhard Collardin GmbHInventors: Lutz Schellenberg, Matthias Hamacher, Ronald Broadbent
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Patent number: 4632851Abstract: Continuous autodeposition from a bath having a low solids concentration and stable coating characteristics is achieved by close control of bath iron concentration, preferably by maintaining iron concentration below about 1.5 gm/l by controlled discard and replacement of bath volume.Type: GrantFiled: April 22, 1985Date of Patent: December 30, 1986Assignee: Amchem Products, Inc.Inventors: Ronald W. Broadbent, Ellsworth A. Stockbower
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Patent number: 4612213Abstract: A stable tetravalent nickel oxide cathode, having a high coulombic capaci for use in high energy density batteries comprising a nickel hydroxide plate prepared by impregnating a porous conducting plaque with nickel hydroxide which is then further wet oxidized by passing a stream of ozone through the plate. The ozonation process further comprises impregnation of the nickel hydroxide plate with an alkaline solution such as an aqueous solution of potassium hydroxide and flowing of a stream of gaseous ozone through the plate by producing a pressure differential across the plate while applying water or potassium hydroxide solution to the plate to facilitate the action of the ozone on the nickel hydroxide-potassium hydroxide mixture. The tetravalent nickel oxide thus formed has the stable gamma structure with a valence approaching +4.0.Type: GrantFiled: August 25, 1982Date of Patent: September 16, 1986Assignee: The United States of America as represented by the Secretary of the NavyInventor: Hubert G. Meunier
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Patent number: 4601916Abstract: An economical process for producing metal plated through holes in metal core circuit boards which permits the formation of small holes and fine conductor lines is disclosed. A metal sheet, which will become the core of a metal core circuit board, is provided with insulation layers on both sides, and through holes are provided through the insulation layers. The process involves incorporating fillers in a resinous coating solution which is electrophoretically applied to the hole walls to form an insulating layer of uniform thickness thereon. An increased diameter in the metal wall portion of each hole acts to restrict flow of the filled resinous coating solution during cure resulting in a straight hole wall. The coating is adhesion promoted and a metal layer is deposited thereon.Type: GrantFiled: July 18, 1984Date of Patent: July 22, 1986Assignee: Kollmorgen Technologies CorporationInventor: James J. Arachtingi
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Patent number: 4597998Abstract: An oil free polyester high solids formulation giving a protective coating having corrosion resistance, surface hardness. The coating includes a highly methylated melamine cross-linking agent; an acid catalyst; a polar solvent system; wetting, defoaming and anti-sagging agents; and pigments. The composition has low VOC, high solids content, and controlled viscosity. It may be applied by hot tank dipping, flow coating, air or electrostatic spraying, with subsequent curing at 300.degree.-350.degree. F. for about 20 minutes.Type: GrantFiled: November 13, 1984Date of Patent: July 1, 1986Inventor: Yehra A. Mostafa
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Patent number: 4587140Abstract: A method of protecting electrical or electronic circuitry by embedding said circuitry in a low molecular weight ethylene-alpha-olefin copolymer composition.Type: GrantFiled: September 27, 1984Date of Patent: May 6, 1986Assignee: Uniroyal Chemical Company, Inc.Inventors: Constance A. Johnson, Aspet V. Merijanian
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Patent number: 4578419Abstract: Iodine and certain iodine compounds are used as activators (oxidizers) in otherwise conventional autodeposition coating compositions, resulting in improved coating quality. When at least one unsaturated recurring unit polymer is comprised within the latex, corrosion resistance of the coating is also improved.Type: GrantFiled: March 28, 1985Date of Patent: March 25, 1986Assignee: Amchem Products, Inc.Inventor: Wilbur S. Hall
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Patent number: 4568576Abstract: A method and apparatus for subjecting articles to surface treatment of a sequence of solutions utilizing a plurality of process tanks and a plurality of supply tanks, each supply tank containing one of the solutions utilized in the process. The process tanks and supply tanks are interconnected by conduit means which include a series of valves which may be activated and deactivated for routing the solution to and from any of the selected tanks. The valves are automatically activated and deactivated by a programmable control which allows for articles introduced into each of the process tanks to be subjected to each of the solutions in a programmed sequence.Type: GrantFiled: June 4, 1984Date of Patent: February 4, 1986Inventors: Clarence O. Minnie, Jr., Edward E. Tomblin
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Patent number: 4554305Abstract: Autodeposition unsaturated latex baths which are hydrogen peroxide-free (using iodine or certain iodine salts or free acids as the oxidizer) and which are hydrofluoric acid-free (using, preferably, acetic acid) afford coatings which can incorporate silicate-containing pigments, fillers, and other ingredients.Type: GrantFiled: March 28, 1985Date of Patent: November 19, 1985Assignee: Amchem Products, Inc.Inventor: Wilbur S. Hall
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Patent number: 4551358Abstract: A nickel oxide electrode is made by impregnating a porous nickel substrate with a dispersion of a nickel compound, converting the compound in situ to nickel hydroxide, and removing reaction products.In order to overcome corrosion problems, facilitate removal of by-products and improve electrode performance, the dispersion is provided in a non-aqueous medium (e.g. as a methanolic solution of NiCl.sub.2.6H.sub.2 O) such that the in situ conversion gives rise to the nickel hydroxide in the form of a gel and to easily removable (e.g. volatile) reaction products. Such a conversion may be carried out by contacting the methanolic solution with an epoxy compound such as propylene oxide.Type: GrantFiled: June 11, 1984Date of Patent: November 5, 1985Assignee: United Kingdom Atomic Energy AuthorityInventors: Edward S. Lane, Michael R. H. Hill
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Patent number: 4531273Abstract: A valve seat for ball valves comprises a ring-shaped or annular body fabricated of sintered metal particles having interparticulate spaces which are substantially completely filled with graphite. The seat is fabricated by pumping a dispersion of colloidal graphite in a liquid carrier through the matrix of a preformed ring-shaped sintered metal body, thereafter heating the body to drive off any portion of the liquid carrier which remains in the interparticulate spaces of the body, and then coining the body to collapse any voids which remain in the body and to mechanically bind into the body the graphite which has been trapped in said interparticulate spaces during the pumping step.Type: GrantFiled: November 6, 1984Date of Patent: July 30, 1985Assignee: Worcester Controls CorporationInventors: Richard T. Smith, Robert H. Osthues
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Patent number: 4526813Abstract: A composition is provided which, when applied to a metal surface, forms a corrosion-inhibiting film thereon. The composition comprises an epoxy resin, an effective amount of a curing agent for the epoxy resin, an alcohol, and a hydrocarbon diluent. The composition is applied by contacting the metal surface with the composition as one solution or as a hydrocarbon solution of the epoxy resin and a solution comprising the alcohol and the curing agent. The composition is particularly useful in the treatment of down-well metal surfaces in oil and gas wells to inhibit the corrosion of the metal.Type: GrantFiled: February 9, 1983Date of Patent: July 2, 1985Assignee: Phillips Petroleum CompanyInventor: Yulin Wu
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Patent number: 4522658Abstract: The present invention relates to a method of inhibiting the oxidative effect of an oxidative environment upon a metal surface utilizing a composition comprising an inhibiting effective amount of an acetylenic alcohol, a quaternary ammonium compound, an aromatic hydrocarbon, an antimony compound, and an aqueous fluid. The metal surface to be protected is contacted with the composition whereby a deposit or coating of at least a portion of the composition constituents is formed on the metal surface.Type: GrantFiled: June 21, 1984Date of Patent: June 11, 1985Assignee: Halliburton CompanyInventor: Michael L. Walker
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Patent number: 4521463Abstract: Anodized aluminum is sealed in a one step process without the necessity of a further desmudging step. A metal acetate salt is mixed with soluble sulfate ion and a dispersing agent to provide a seal without leaving visible smudge on anodized aluminum.Type: GrantFiled: August 18, 1982Date of Patent: June 4, 1985Assignee: Aluminum Company of AmericaInventors: John H. Powers, Edward G. Remaley
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Patent number: 4518648Abstract: A sheet material adapted for producing pressure sensitive elements includes an electrically conductive net-shaped member having projecting and recessed portions, and an electrically insulating layer in which the net-shaped member is buried such that only the projecting and recessed portions thereof are exposed out of the insulating layer, planar members are further provided on both sides of the insulating layer, while each of the planar members is provided with a resistance layer deposited on a surface thereof facing the insulating layer, so that when a depressing force is applied across the planar members, the resistance layer deposited thereon is brought into contact with the exposed portions of the net-shaped member. A method for producing the sheet material is also defined within the scope of the invention.Type: GrantFiled: March 9, 1984Date of Patent: May 21, 1985Assignee: Alps Electric Co., Ltd.Inventors: Hiroyasu Miyata, Kazuhiko Ito
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Patent number: 4518633Abstract: In a method of insulating an electrical conductor, the conductor passes upwardly through a coating fluid and a die means which is carried in a vertical position by a supporting fluid force. This force is provided by the supporting force of the fluid or a magnetic force which holds the die in suspension. Freedom for horizontal movement of the die is provided to enable it to move in a manner corresponding to any lateral movement of the conductor, this die movement being controlled by hydrodynamic forces between conductor and die to maintain the concentricity of a fluid layer formed on the conductor.Type: GrantFiled: April 6, 1984Date of Patent: May 21, 1985Assignee: Northern Telecom LimitedInventors: Jorg-Hein Walling, Michael A. Shannon, Gerald Arbuthnot
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Patent number: 4500566Abstract: Utilizing an organometallic precursor, a metal oxide is formed within the pores of a porous sintered blank substantially uniformly throughout the porosity of the blank producing a porous bubble pressure barrier of predetermined pore size. The barrier is integrally sintered to a face of an electrode, the median pore size of the barrier being significantly smaller than that of the electrode, producing a composite useful as an electrode in a molten carbonate fuel cell. The blank and the electrode are composed of metal.Type: GrantFiled: October 7, 1982Date of Patent: February 19, 1985Assignee: General Electric CompanyInventors: Bradley R. Karas, Charles E. Baumgartner
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Patent number: 4486510Abstract: A method of manufacturing a tuner chassis, in which a tuner chassis assembly is entirely dipped in a molten solder bath to effect the plating of the chassis surface with a solder layer, and thereafter the chassis assembly is dipped in an oil bath heated to a temperature higher than the melting temperature of the solder and then raised, whereby the state of solder plating on the chassis surface is improved by making use of the mechanism that oil forms an oil film on the chassis.Type: GrantFiled: December 5, 1980Date of Patent: December 4, 1984Assignee: Alps Electric Co., Ltd.Inventors: Isao Tanimoto, Tsuneo Yamada, Katsuhisa Yamada
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Patent number: 4479981Abstract: Thixotropic water reducible, dispersible, corrosion resistant coating composition comprising amine salt of blended microcrystalline waxes in which the waxes have an acid number of 7-200 and the amine is preferably morpholine with C-8-30 carboxylic acid, preferably oleic, an overbased alkaline earth sulfonate, e.g., SACI, an alcoholic coupling solvent, e.g., propyl glycol ether and water (Tectyl 310).Type: GrantFiled: May 3, 1982Date of Patent: October 30, 1984Assignee: Ashland Oil, Inc.Inventors: Jonathan K. Winters, Fred B. Savell, III
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Patent number: 4467067Abstract: An electroless nickel plating composition characterized by the addition of a polymer formed from a 2-acrylamido or 2-methacrylamido alkyl sulfonic acid monomer. The polymer additive increases the rate of deposition from solution, and to a minor extent, improves the appearance of a nickel deposited from the solution.Type: GrantFiled: November 22, 1983Date of Patent: August 21, 1984Assignee: Shipley CompanyInventors: Silvester P. Valayil, Vita Aronson
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Patent number: 4457956Abstract: A method which allows autodeposition onto a non-metallic surface wherein a metallic powder is applied to the non-metallic surface followed by application of an autodeposition coating.Type: GrantFiled: August 11, 1980Date of Patent: July 3, 1984Assignee: Union Carbide CorporationInventor: Kisoon Park
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Patent number: 4448798Abstract: The present invention comprises a method of coating outside surface of a cylindrical member, with one end being closed and the other end being left open, which comprises dipping said member in a coating material, while holding the same substantially vertically and with the closed end being turned upward, characterized in that detecting the increase in the internal pressure caused by the evaporation of solvent of said coating material in an internal hollow part of said member, and releasing a part of the gas from said internal hollow part to prevent generating bubbles therefrom into the coating material.Type: GrantFiled: April 18, 1983Date of Patent: May 15, 1984Assignee: Canon Kabushiki KaishaInventors: Masahide Kageyama, Takeshi Fujita
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Patent number: 4448822Abstract: An apparatus for coating a substrate with an alumina hydrate film includes a coating vessel having at least one support therein; the substrate to be coated is mounted on the support; and at least one porous or perforated container for holding aluminum metal to react with a caustic solution to form an aluminate coating solution is also mounted on the support. The apparatus can also contain means for mechanical agitation, such as a rotational stirring device. In the coating of the substrate a caustic solution is contacted with a substrate and with at least one porous container having aluminum metal therein. The aluminum metal reacts with the caustic solution to form an aluminate coating solution and then an alumina hydrate film is deposited on the substrate. The caustic solution is preferably subjected to mechanical agitation during the coating process.Type: GrantFiled: June 28, 1982Date of Patent: May 15, 1984Assignee: Texaco Inc.Inventors: Kung-You Lee, Jackson K. Chiou, Matthew A. McMahon
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Patent number: 4446057Abstract: An apparatus and method for coating at least one substrate with an alumina hydrate film includes a coating vessel for containing a caustic coating solution, and at least one support within the coating vessel upon which are mounted substrates and porous containers. The porous containers hold aluminum metal for reacting with the caustic coating solution. A partition is situated between the porous containers and the substrates, which partition separates the gas bubbles produced by the reaction of the aluminum metal and the caustic coating solution from the substrates and which partition prevents the gas bubbles from contacting the substrates.Type: GrantFiled: July 8, 1982Date of Patent: May 1, 1984Assignee: Texaco Inc.Inventors: Kung-You Lee, Matthew A. McMahon, Justin C. Powell
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Patent number: 4444803Abstract: Water reducible, dispersible, corrosion resistant coating compositions comprising organic vehicle containing wax compounds, organic esters, carboxylic acid, amines, alcohol coupling agent and water and methods for their manufacture are disclosed and demonstrated to be useful for protecting metals, e.g. ferrous alloys, from corrosion.Type: GrantFiled: May 3, 1982Date of Patent: April 24, 1984Assignee: Ashland Oil, Inc.Inventors: Jonathan K. Winters, Fred B. Savell, III
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Patent number: 4444802Abstract: Water reducible, dispersible coating composition comprising: organic vehicle containing wax compounds of low oil content, neopentyl ester, carboxylic acid, amine, alcoholic coupling solvent, water. Vehicle is preferably amine salt of organic wax of low oil content, long-chain carboxylic acid and neopentyl ester, e.g. C30 acid and pentaerythritol.Type: GrantFiled: May 3, 1982Date of Patent: April 24, 1984Assignee: Ashland Oil, Inc.Inventors: Jonathan K. Winters, Fred B. Savell, III
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Patent number: 4427721Abstract: Carbonaceous deposition on the surface of steel cracker tubes in chemical plant for the thermal cracking of hydrocarbons is a serious problem. It is met, in the invention, by providing the surface with a refractory oxide coating by contacting the surface with a sol comprising an aqueous dispersion of substantially unaggregated primary particles, the sol being capable of conversion to a gel the bulk density of which being at least 40% of the theoretical density of the refractory oxide when measured at ambient temperature and the gel being convertible to the refractory material, converting the sol to the gel, and firing.Type: GrantFiled: February 24, 1981Date of Patent: January 24, 1984Assignee: United Kingdom Atomic Energy AuthorityInventors: James A. Cairns, Robert L. Nelson, James L. Woodhead
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Patent number: 4419394Abstract: A coating solution, useful in the process of coating a substrate with an alumina film, can be formed by adding to an alkali aluminate solution a sufficient quantity of an alumina gel which is a precipitate formed by the reaction of aluminum sulfate with aqueous ammonium hydroxide at a pH of between about 6 and 8. The added alumina gel effects a coating of an adherent alumina trihydrate film on a substrate upon the contacting of the substrate with the coating solution.Type: GrantFiled: November 16, 1981Date of Patent: December 6, 1983Assignee: Texaco Inc.Inventor: John M. Crone, Jr.
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Patent number: 4414350Abstract: An autodepositing coating composition of the ferric iron-containing type wherein ferrous iron tends to build up in concentration in the composition and affect adversely the coating capabilities of the composition as it is used continuously to autodeposit coatings on iron-containing surfaces, the improvement comprising adding to said composition, in an amount effective to decrease the amount of ferrous iron which tends to adversely affect the coating capabilities of the composition, a carboxylic acid which is effective in forming a complex with said ferrous iron.Type: GrantFiled: August 24, 1981Date of Patent: November 8, 1983Assignee: Amchem Products, Inc.Inventor: Wilbur S. Hall
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Patent number: 4411937Abstract: Method and composition for applying an organic coating to a metallic surface, the surface being contacted with an acidic aqueous coating composition comprising an organic coating-forming material, fluoride, and ferric iron, wherein the thickness and/or weight of the coating formed on the surface can be controlled by varying the time the surface is immersed in the composition.Type: GrantFiled: June 14, 1982Date of Patent: October 25, 1983Assignee: Amchem Products, Inc.Inventors: Takao Nishida, Takashi Hirohata
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Patent number: 4398968Abstract: A method is presented for preparing a boride layer on a transition metal substrate for use in corrosive environments or as a harden surface in machine applications. This method is particularly useful in treating current collectors for use within a high temperature and corrosive electrochemical cell environment. A melt of a alkali metal boride tetrafluoride salt including such as KF to lower its melting point is prepared including a dissolved boron containing material, for instance NiB, MnB.sub.2, or CrB.sub.2. A transition metal to be coated is immersed in the melt at a temperature of no more than 700.degree. C. and a surface boride layer of that transition metal is formed within a period of about 24 hours on the substrate surface.Type: GrantFiled: August 28, 1981Date of Patent: August 16, 1983Inventors: Koichiro Koyama, Hiroshi Shimotake