Inorganic Coating Patents (Class 427/343)
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Patent number: 6350488Abstract: A method of synthesizing high purity carbon nanotubes vertically aligned over a large size substrate by thermal chemical vapor deposition (CVD). In the synthesis method, isolated nano-sized catalytic metal particles are formed over a substrate by etching, and purified carbon nanotubes are grown vertically aligned, from the catalytic metal particles by thermal CVD using a carbon source gas.Type: GrantFiled: June 9, 2000Date of Patent: February 26, 2002Assignee: Iljin Nanotech Co., Ltd.Inventors: Cheol-jin Lee, Jae-eun Yoo
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Patent number: 6296896Abstract: A method for manufacturing an electron-emitting device processing an electroconductive film upon which an electron-emission region is formed is characterized in that the formation process of formation of the electron-emission region includes a process of application of metal compound-containing material and film thickness controlling agent to the substrate. A method for manufacturing an electron source comprises a substrate, and a plurality of electron-emitting devices arrayed upon the substrate, wherein the electron-emitting devices are manufactured according to the method for manufacturing the electron-emitting device. A method for manufacturing an image-forming apparatus comprises a substrate, an electron source comprised of a plurality of electron-emitting devices arrayed upon the substrate, and an image-forming member, wherein the electron-emitting devices are manufactured according to the method for manufacturing an electron-emitting device.Type: GrantFiled: April 2, 1996Date of Patent: October 2, 2001Assignee: Canon Kabushiki KaishaInventors: Yasuo Takahashi, Naoko Miura
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Patent number: 6284122Abstract: A process for non-continuous galvanization of a metal object with a Zn—Al alloy including the steps of pre-coating the object with a metallic layer of sufficient thickness to protect the object from oxidation and yet sufficiently thin to permit the pre-coating to substantially completely react with or dissolve in the molten Zn—Al bath, subjecting the precoated object to a surface activation treatment by immersing it in hydrochloric acid and thereafter allowing the surface to dry with a protective coating of a chloride salt, and thereafter immersing the object in the Zn—Al bath.Type: GrantFiled: July 12, 2000Date of Patent: September 4, 2001Assignee: International Lead Zinc Research Organization, Inc.Inventors: Massimo Memmi, Bruno Brevaglieri, Stefano Natali, Michele Cecchini
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Patent number: 6270983Abstract: The invention relates to surfaces coated with streptavidin and avidin for use in immunoassays, wherein the surfaces comprise a layer of streptavidin and avidin which are bonded on a surface of a solid supporting material through a biotinylated adhering agent.Type: GrantFiled: February 22, 2000Date of Patent: August 7, 2001Assignee: BioTeZ Berlin-Buch GmbHInventors: Pavel Strohner, Ulrike Immer
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Publication number: 20010010836Abstract: A method of partially forming oxide layers on a surface of a glass substrate by forming an oxide layer on the surface of the substrate, partially contacting the surface of the oxide layer formed on the substrate with a paste comprising an inorganic compound different from the oxide, organic solvents and silicon powder to partially dissolving the oxide layer with the paste, and removing the dissolved components of the layer together with the paste, by which the oxide layers are partially formed on the surface of the substrate efficiently and surely.Type: ApplicationFiled: March 16, 2001Publication date: August 2, 2001Inventors: Koichi Sakaguchi, Osamu Ishii, Yasunori Shiraishi
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Patent number: 6268017Abstract: A method for providing a partial plating to a lead pin, comprising the steps of plating an entire surface of the lead pin; covering a first part of a plated surface of the lead pin by a gel member; and subjecting a second part of the plated surface of the lead pin, which extends out of the gel member, to a metal-coating removing agent, to remove a metal coating of the second part of the plated surface. The plating step may include providing a composite plating on the entire surface of the lead pin, and the subjecting step may include removing an uppermost metal layer of the composite plating by the metal-coating removing agent. The composite plating may include a nickel base layer and a gold uppermost layer deposited on the nickel base layer. The gel member may be formed from a non-oily clay or paper-mache for handcraft use.Type: GrantFiled: July 13, 1999Date of Patent: July 31, 2001Assignee: Fujitsu Takamisawa Component LimitedInventors: Masayuki Takeuchi, Katsumasa Yoshinari, Kazuyiki Futaki, Kouji Nishimura, Yoshinobu Miyanoo, Ryoji Arai, Nobuyuki Takei
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Patent number: 6267813Abstract: The invention concerns a method for the colouring of concrete, and especially in the colours blue or green. According to the method, copper powder from grinding work, for example, may be added before the concrete hardens. This colours the concrete mix due to its reaction with a substance added to the concrete.Type: GrantFiled: March 26, 1999Date of Patent: July 31, 2001Inventor: Pertti Juhani Kukkonen
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Patent number: 6258418Abstract: A method for producing a durable, non-stick, diamond-tiled implement and the diamond-tiled implement thereby produced. Diamond particles are distributed on a surface of a workpiece containing a ceramic binder. The ceramic binder on the surface of the workpiece is heated to above its glass temperature to fuse the diamond particles in and onto the workpiece. The workpiece is then cooled so that the diamond particles are bonded to and at least partially embedded in the ceramic binder at the surface of the workpiece to produce durable, non-stick, diamond-tiled implements including cookware, bakeware, hot-presses, ski surfaces, skid surfaces, marine articles, and mechanical polishing wheels. Other implements of this invention utilize a high diamond content to produce thermally conducting and electrically insulating coatings for heat spreaders or heaters.Type: GrantFiled: June 23, 1999Date of Patent: July 10, 2001Inventors: Ronald A. Rudder, Raymond E. Thomas
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Patent number: 6255228Abstract: A method for removing contaminants from a semiconductor wafer having a spin on coating of material. Contaminants are removed by applying a cleaning solution to the periphery, and preferably, the exposed backside of the wafer after the edge bead has been dissolved and removed. The cleaning solution is formulated to react chemically with unwanted coating material residue to form a compound that may be ejected from the periphery of the spinning wafer. Any residual solution or precipitate that is not ejected from the wafer may be rinsed away with water, preferably deoinized water. One exemplary use of this method is the removal of metallic contaminants that may be left on the periphery and backside of a wafer after the formation of ferroelectric film coatings. A cleaning solution comprising a mixture of hydrochloric acid HCl and water H2O or ammonium hydroxide NH4OH and water H2O is applied to the periphery of the spinning wafer.Type: GrantFiled: May 30, 2000Date of Patent: July 3, 2001Assignee: Micron Technology, Inc.Inventor: J. Brett Rolfson
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Patent number: 6231686Abstract: A method of treating a metal object having an outer layer including zinc includes applying to the object a treating material in the form of an alkaline solution or a gas. The treating material reacts to form a reaction layer on the outer layer. The reaction layer includes a zinc reaction product. A protective coating such as lubricant is applied to the object, wherein the reaction layer is present in an amount effective to increase a lubricity of the object. In another embodiment the metal object includes an outer layer including zinc which may be substantially non-oxidized. A reaction layer comprising zinc carbonate is disposed on the outer layer. The reaction layer is present in an amount effective to increase a lubricity of the object during a forming process. A protective coating may be in contact with the reaction layer.Type: GrantFiled: September 15, 1998Date of Patent: May 15, 2001Assignee: LTV Steel Company, Inc.Inventor: George R. Eierman
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Patent number: 6231989Abstract: A coating is formed on a substrate by depositing a solution comprising a resin containing at least 2 Si—H groups and a solvent in a manner in which at least 5 volume % of the solvent remains in the coating after deposition followed by exposing the coating to an environment comprising a basic catalyst and water at a concentration sufficient to cause condensation of the Si—H groups and evaporating the solvent from the coating to form a porous network coating. The method of the invention is particularly useful for applying low dielectric constant coatings on electronic devices.Type: GrantFiled: November 20, 1998Date of Patent: May 15, 2001Assignee: Dow Corning CorporationInventors: Kyuha Chung, Eric Scott Moyer, Michael John Spaulding
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Patent number: 6224972Abstract: The present invention discloses an HSS tool with a PVD coating and with at least one cutting edge. The cutting edge has a radius of 15-25 &mgr;m and the carbides in the HSS are in contact with the coating. The present invention also relates to a method of making an HSS tool provided with a PVD coating with improved wear resistance. The improvement is obtained by subjecting the tool prior to the deposition of the coating to an electropolishing treatment such that a cutting edge radius of 15-25 &mgr;m is obtained and that the carbides in the HSS are revealed.Type: GrantFiled: June 7, 1999Date of Patent: May 1, 2001Assignee: Sandvik ABInventors: Anders Nordgren, Peter Littecke, Hans Johansson
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Patent number: 6221495Abstract: A process for preparing thin Cd2SnO4 films. The process comprises the steps of RF sputter coating a Cd2SnO4 layer onto a first substrate; coating a second substrate with a CdS layer; contacting the Cd2SnO4 layer with the CdS layer in a water- and oxygen-free environment and heating the first and second substrates and the Cd2SnO4 and CdS layers to a temperature sufficient to induce crystallization of the Cd2SnO4 layer into a uniform single-phase spinel-type structure, for a time sufficient to allow full crystallization of the Cd2SnO4 layer at that temperature; cooling the first and second substrates to room temperature; and separating the first and second substrates and layers from each other. The process can be conducted at temperatures less than 600° C., allowing the use of inexpensive soda lime glass substrates.Type: GrantFiled: November 7, 1996Date of Patent: April 24, 2001Assignee: Midwest Research InstituteInventors: Xuanzhi Wu, Timothy J. Coutts
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Patent number: 6221174Abstract: The present invention is a method of wafer processing which improves the reliability of an integrated titanium (Ti)/titanium nitride (TiN) CVD film formed from a reaction of titanium tetrachloride (TiCi4) and ammonia (NH3). A Ti film is subject to a treatment of NH3 gas to render the Ti film unreactive towards attack by chlorine and hydrogen chloride. A thin seed layer of TiN film is deposited upon the treated Ti film using a thermal TiCl4/NH3 reaction. Subsequent TiN film deposition upon the seed layer results in a successful integration of a Ti/TiN film stack for a Ti film thickness up to about 300 Å.Type: GrantFiled: February 11, 1999Date of Patent: April 24, 2001Assignee: Applied Materials, Inc.Inventors: Fufa Chen, Yin Lin, Jianhua Hu, Frederick Wu, Ming Xi, Li Wu
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Patent number: 6194026Abstract: Manufacture of superalloy component wherein the component is blasted with abrasive grit particles at one or more stages during the manufacture, is treated with a chemical grit removal medium effective to dissolve and remove abrasive grit particles from the surface of the component without degradation of the component (substrate), and then is coated with a protective coating such that entrapped grit particles are substantially reduced or eliminated from the coating.Type: GrantFiled: October 19, 1998Date of Patent: February 27, 2001Assignee: Howmet Research CorporationInventors: Bruce M. Warnes, John E. Schilbe, Alexander J. Nordin, Joel L. Cockerill
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Patent number: 6183852Abstract: A fibrous ceramic mat is molded from a slurry of ceramic fibers and/or ceramic microparticles and/or a metal. The mat is impregnated with a sol prior to drying. A catalyst for the sol is introduced into the mat to cause the sol to gel. The sol-gel binder forms bonds so that the mat is dimensionally stabilized. The mat is dried to produce the desired ceramic insulation that has preferably a consistent microstructure and a fully gelled sol-gel binder through its entire thickness. If we use a metal, it corrodes (i.e., oxidizes) or otherwise reacts to form a refractory binder that augments the sol and reduces the need to infuse sol incrementally to achieve strength. Using metal powder significantly reduces the cost of manufacture.Type: GrantFiled: March 11, 1994Date of Patent: February 6, 2001Assignee: The Boeing CompanyInventors: Michael E. Rorabaugh, Darryl F. Garrigus, Juris Verzemnieks
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Patent number: 6123997Abstract: A thermal barrier coating system and a method for forming the coating system which yields a thermal barrier coating having good adhesion to a bond coat overlying a metal superalloy substrate. The adhesion of the bond coat and the thermal barrier coating is enhanced by forming a mature .alpha.-alumina (Al.sub.2 O.sub.3) scale at the bond coat-TBC interface. The desired mature .alpha.-alumina scale can be obtained by utilizing one or more of the following steps: preoxidation of the bond coat at certain minimum temperatures and durations; inoculation of the surface of the bond coat; surface doping or alloying of the bond coat surface; and the addition of noble metals to the bond coat. Each of these steps promotes the formation of .alpha.-alumina and avoids the formation of the .gamma., .delta. and .theta.-alumina phases which undergo phase transformations at elevated temperatures, with the result that a more spallation-resistant thermal barrier coating system is obtained.Type: GrantFiled: October 15, 1997Date of Patent: September 26, 2000Assignee: General Electric CompanyInventors: Jon C. Schaeffer, William B. Connor, Robert D. Field
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Patent number: 6114254Abstract: A method for removing contaminants from a semiconductor wafer having a spin on coating of material. Contaminants are removed by applying a cleaning solution to the periphery, and preferably, the exposed backside of the wafer after the edge bead has been dissolved and removed. The cleaning solution is formulated to react chemically with unwanted coating material residue to form a compound that may be ejected from the periphery of the spinning wafer. Any residual solution or precipitate that is not ejected from the wafer may be rinsed away with water, preferably deionized water. One exemplary use of this method is the removal of metallic contaminants that may be left on the periphery and backside of a wafer after the formation of ferroelectric film coatings. A cleaning solution comprising a mixture of hydrochloric acid HCl and water H.sub.2 O or ammonium hydroxide NH.sub.4 OH and water H.sub.2 O is applied to the periphery of the spinning wafer.Type: GrantFiled: October 15, 1996Date of Patent: September 5, 2000Assignee: Micron Technology, Inc.Inventor: J. Brett Rolfson
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Patent number: 6086947Abstract: A conductive adhesion layer (e.g. titanium 150 .ANG. thick) is formed on a substrate. A first conductive barrier layer (e.g. high-density gold-colored titanium-nitride 300 .ANG. thick) having properties of microcracking in a first direction to relieve inherent stress is deposited on the conductive adhesion layer. A second conductive barrier layer (e.g. low-density brown-colored titanium-nitride 400 .ANG. thick) having properties of low inherent stress is deposited on the first barrier layer. The second barrier layer may be exposed to air, thereby further inhibiting the leakage to the substrate of material from a conductive layer (e.g. aluminum silicon copper or aluminum copper) when a third barrier layer (e.g. high-density gold-colored titanium nitride 300 .ANG. thick) and such conductive layer are thereafter sequentially deposited on the second barrier layer. Such method may be used to provide a substantially uniform deposition on the walls of a groove for receiving a via. An insulating coating (e.g.Type: GrantFiled: October 10, 1996Date of Patent: July 11, 2000Assignee: Sputtered Films, Inc.Inventor: Andrew P. Clarke
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Patent number: 6074699Abstract: An article has at its surface a nonmetallic ceramic form of a cation reactive with phosphate ion to form a ceramic phosphate, such as an oxide of a cation selected from the group consisting of beryllium, aluminum, iron, magnesium, calcium, thorium, barium, zirconium, zinc, silicon, and mixtures thereof. A source of reactive phosphate ions, such as concentrated phosphoric acid or monoaluminum phosphate, is applied to the surface of the article. The surface of the article is thereafter heated to cause the nonmetallic ceramic form of the cation and the source of the reactive phosphate ions to react together, producing a phosphate-bonded hard layer at the surface of the article.Type: GrantFiled: April 29, 1994Date of Patent: June 13, 2000Assignee: McDonnell Douglas CorporationInventors: Robert A. Dichiara, Jr., Robert W Kreutzer
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Patent number: 5989652Abstract: A titanium/titanium nitride film stack can be formed with reduced amounts of impurity by depositing onto a substrate a film of titanium using plasma-enhanced chemical vapor deposition of titanium tetrachloride and hydrogen. This film is then subjected to a hydrogen/argon plasma which significantly reduces the chlorine content of the titanium film. The titanium film can then be subjected to an ammonia plasma which will form a thin layer of titanium nitride which is then coated with a thick layer of titanium nitride using plasma-enhanced chemical vapor deposition of titanium tetrachloride and ammonia. The hydrogen/argon anneal significantly reduces the chlorine content of the titanium film and thus the chlorine content at the titanium substrate interface, particularly when the substrate contains aluminum. This enhances the overall reliability of the formed product.Type: GrantFiled: January 31, 1997Date of Patent: November 23, 1999Assignee: Tokyo Electron LimitedInventors: Michael S. Ameen, Joseph T. Hillman
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Patent number: 5985048Abstract: A method for creating an oxide coating on the surface of a component formed from austenitic stainless steel or nickel alloy steel is set forth. The component has a naturally formed oxide film at the surface. The naturally formed oxide is enhanced through a process comprising at least two steps. In the first step, the component is heated in the presence of circulating dry air for a first period of time at a temperature of approximately 300 degrees centigrade. In the second step, the component is heated in the presence of static dry air at an elevated pressure for a second period of time at a temperature that is higher than the temperature during the first period. The exterior portion of the enhanced oxide coating is removed with an oxidizing treatment whereby an oxide coating having a high ratio of chromium to iron is exposed at the surface of the stainless steel.Type: GrantFiled: April 7, 1998Date of Patent: November 16, 1999Assignee: Semitool, Inc.Inventors: Raymond W. Wahlert, Arthur H. Tuthill
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Patent number: 5965192Abstract: A phosphor comprises, in atomic percentages, 90% to 100% of a mixed metal oxide MxTyOz, wherein M is a metal selected from Zn, Sn, In, Cu, and combinations thereof, T is a refractory metal selected from Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and combinations thereof, and O is Oxygen, x, y, and z being chosen such that z is at most stoichiometric for MxTyOz; and 0% to 10% of a dopant comprising a substance selected from a rare earth element of the lanthanide series, Mn, Cr, and combinations thereof, or stoichiometrically excess zinc, copper, tin, or indium. Cathodoluminescent phosphor compositions stimulable by electrons of very low energy are prepared from metal oxides treated with refractory metals in various processes disclosed.Type: GrantFiled: July 28, 1997Date of Patent: October 12, 1999Assignee: Advanced Vision Technologies, Inc.Inventor: Michael D. Potter
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Patent number: 5955387Abstract: A ceramic composite is provided comprising ceramic fibers, glass microballoons and/or diatoms, bound together with a ceramic reinforcing cloth with a sol-gel ceramic binder. The composite is particularly useful as a high strength, high temperature insulation material.Type: GrantFiled: June 23, 1997Date of Patent: September 21, 1999Assignee: The Boeing CompanyInventor: Darryl F. Garrigus
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Patent number: 5955179Abstract: A coating for the structured production of conductors on the surface of electrically insulating substrates, in particular for producing sensor elements and printed circuit boards. The coating is formed from a doped tin oxide layer having the composition Sn.sub.1-(y+z) A.sub.y B.sub.z O.sub.2, in which A is Sb or F and B is In or Al. The relative proportions in the coating of the dopants antimony (or fluorine) and indium (or aluminum) are defined by the limits 0.02<y+z<0.11 and satisfy the condition 1.4<y/z<2.2. The coating can be structured by ablation using electromagnetic laser radiation in the wavelength range 157-1064 nm. The creates an economical means for high resolution and waste-free structuring of insulating channels in thin, electrically conductive layers having high chemical, mechanical and thermal resistance on glass or ceramic substrates.Type: GrantFiled: July 23, 1997Date of Patent: September 21, 1999Assignee: LPKF Laser & Electronics AGInventors: Joerg Kickelhain, Bruno Vitt
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Patent number: 5935646Abstract: A process for producing a molecular sieve silica membrane comprising depositing a hybrid organic-inorganic polymer comprising at least one organic constituent and at least one inorganic constituent on a porous substrate material and removing at least a portion of the at least one organic constituent of the hybrid organic-inorganic polymer, forming a porous film.Type: GrantFiled: January 26, 1998Date of Patent: August 10, 1999Assignees: Gas Research Institute, Sandia National LaboratoriesInventors: Narayan K. Raman, Charles Jeffrey Brinker
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Patent number: 5879744Abstract: Disclosed herewith is a process of forming an aerogel composite which comprises introducing a gaseous material into a formed aerogel monolith or powder, and causing decomposition of said gaseous material in said aerogel in amounts sufficient to cause deposition of the decomposition products of the gas on the surfaces of the pores of the said aerogel.Type: GrantFiled: August 8, 1997Date of Patent: March 9, 1999Assignee: The Regents of the University of CaliforniaInventors: Wanqing Cao, Arlon Jason Hunt
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Patent number: 5861076Abstract: The present invention relates to a bond enhancement process for promoting strong, stable adhesive bonds between surfaces of copper foil and adjacent resin impregnated substrates or superimposed metallic sublayers. According to the process of the invention, a black oxide-coated copper surface is treated with an aqueous reducing solution containing sodium metabisulfite and sodium sulfide to convert the black oxide coating to a roughened metallic copper coating. The roughened metallic copper-coated surface is then passivated and laminated to a resin impregnated substrate. The bond enhancement process is especially useful in multilayer printed circuit fabrication and in the treatment of copper circuit lines and areas which are disconnected from each other, that is, which do not have electrically conductive continuity.Type: GrantFiled: September 6, 1995Date of Patent: January 19, 1999Assignee: Park Electrochemical CorporationInventors: Edwin J. Adlam, Sukianto Rusli, Jordan L. Wahl, Tayfun Ilercil, Robert A. Forcier, Jerome S. Sallo
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Patent number: 5853798Abstract: The invention is a process for formation of an electrode on a solid polymer anion exchange membrane to increase rates of reaction at a reaction surface of the membrane. The process includes the steps of soaking a polymer anion exchange membrane in a solution containing an anionic entity wherein a desired metal catalyst is contained within the anionic entity so that anions containing the metal catalyst exchange into the membrane by electrostatic attraction, and exposing the membrane to a reducing agent so the metal catalyst is reduced to a metallic form to become physically secured at a reaction surface of the membrane to thereby form the electrode adjacent the reaction surface. In preparation of an electrode on an anion exchange membrane, the process is concluded by rinsing the membrane in distilled water and then the membrane is cycled through the soaking, exposing and rinsing steps until a desired level of catalyst loading is achieved.Type: GrantFiled: September 12, 1997Date of Patent: December 29, 1998Assignee: United Technologies CorporationInventor: James R. Dube
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Patent number: 5846428Abstract: The present invention concerns a method for modifying the transfer characteristics of a porous organic or inorganic membrane, in whicha) on the said membrane, at least one layer is formed by applying at least one homogeneous solution obtained by mixing one or more rare-earth or alkaline-earth fluoroalkoxides in an anhydrous organic solvent at room temperature and in an inert atmosphere,b) hydrolysis is effected by placing the coating formed at a) in contact with a quantity of water at least equal to the stoichiometric quantity required to hydrolyse the fluoroalkoxides,c) the membrane is rinsed with water to eliminate the soluble salts formed. The membranes thus modified are useful for the regeneration of photographic solutions, in particular black and white developers, or for the separation of organic compounds from aqueous effluents.Type: GrantFiled: September 23, 1996Date of Patent: December 8, 1998Assignee: Eastman Kodak CompanyInventors: Didier Martin, Olivier Jean-Christian Poncelet, Jeanine Rigola
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Patent number: 5840113Abstract: An improved finely divided rubber-reinforcing clay mineral composition can be produced by employing a hydrous kaolin clay surface treated with a functional silane, a methylene donor compound such as hexamethylenetetramine, and a multifunctional methylene acceptor such as resorcinol. A novel process of preparation is provided. The improved reinforcing, treated clay filler can be combined with natural or synthetic elastomer compositions which can be cured to elastomer products which have improved physical properties, such as modulus, tensile, tear, wear resistance and/or resistance to heat build-up.Type: GrantFiled: April 14, 1998Date of Patent: November 24, 1998Assignee: J.M. Huber CorporationInventors: Gary M. Freeman, Carl J. Marshall, Jr., Walter O. Lackey, Thomas J. Lynch
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Patent number: 5830537Abstract: A method for manufacturing a roll for use in the production of paper in which the roll is coated by thermal spraying. A sealing-agent solution is spread onto a coating of the roll which is produced by thermal spraying to seal pores in the coating, the sealing-agent solution is then allowed to be absorbed into the pores in the coating. The roll is heated in order to eliminate the water from the sealing-agent solution, and upon elimination of the water, the sealing-agent solution crystallizes in the pores in the coating after which the roll is allowed to cool. A roll for use in the production of paper having a frame and a roll coating produced by thermal spraying. The coating is sealed by crystals formed out of a sealing-agent solution after the elimination of water therefrom. A coating for a roll for use in the production of paper produced by thermal spraying and having pores. In order to seal the coating, a sealing agent is crystallized in the pores in the coating.Type: GrantFiled: October 18, 1996Date of Patent: November 3, 1998Assignee: Valmet CorporationInventor: Ari Telama
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Patent number: 5820805Abstract: Electrically conductive fiber is made from a multicomponent filament having a suffusible component present at some or all of the periphery of the filament, and an impervious component that is substantially impervious to a suffusion coating solution. Finely-divided, electrically conductive particles are suffused into a surface of the suffusible component to render an electrical resistance in the filament of not more than about 10.sup.9 ohms/cm but the particles do not significantly suffuse into the impervious component.Type: GrantFiled: July 15, 1997Date of Patent: October 13, 1998Assignee: BASF CorporationInventor: John A. Hodan
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Patent number: 5820918Abstract: A process for impregnating a medical device made from a water absorbable polymer material, e.g., a hydrogel, with a medical compound having low solubility in aqueous solutions, e.g., an antiseptic or radiopaque compound, is disclosed. The device is first infiltrated with an aqueous solution containing a first water soluble, ionizable compound, and subsequently infiltrated with an aqueous solution containing a second water soluble, ionizable compound. The ionizable compounds are selected such that they react after mutual contact to form the medical compound in-situ within the device.Type: GrantFiled: July 11, 1996Date of Patent: October 13, 1998Assignee: Hercules IncorporatedInventors: John M. Ronan, Samuel A. Thompson
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Patent number: 5770275Abstract: A process for producing a molecular sieve silica membrane comprising depositing a hybrid organic-inorganic polymer comprising at least one organic constituent and at least one inorganic constituent on a porous substrate material and removing at least a portion of the at least one organic constituent of the hybrid organic-inorganic polymer, forming a porous film.Type: GrantFiled: August 23, 1996Date of Patent: June 23, 1998Inventors: Narayan K. Raman, Charles Jeffrey Brinker
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Patent number: 5731041Abstract: The invention is to a method for producing a high surface substrate. A mask is positioned (31) over a substrate to define a deposition area. Thereafter at least two dissimilar materials are simultaneously deposited (32) through the mask onto the deposition area. Then one of the deposited materials is selectively removed (33) to provide a high surface area deposited substrate.Type: GrantFiled: September 11, 1996Date of Patent: March 24, 1998Assignee: Texas Instruments IncorporatedInventors: Donald C. Abbott, Mohendra S. Bawa
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Patent number: 5725907Abstract: A metal material characterized in that the material comprises a substrate metal, a film comprising a nickel fluoride layer and formed on the substrate metal, and a film comprising a carbon layer and formed on the film.Type: GrantFiled: October 16, 1996Date of Patent: March 10, 1998Assignees: Hashimoto Chemical Co., Ltd., Mitsubishi Aluminum Co., Ltd.Inventors: Tadahiro Ohmi, Kazuo Chiba, Hideo Kume, Yutaka Mikasa, Matagoro Maeno, Yoshinori Nakagawa, Hiroto Izumi, Kazuhito Yamane
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Patent number: 5714244Abstract: A material is impregnated with an aqueous solution containing precursors of a glass-containing phosphate base modified at least by the presence of zinc oxide, then dried and heat treated to form an internal oxidation protection constituted by the modified phosphate glass-containing base. The precursors are introduced into the aqueous solution so as to form a glass-containing base in which the molar ratio between the glass modifying oxides, comprising zinc oxide, and the glass forming oxides, principally comprising or consisting of phosphoric anhydride, is sufficiently high, in particular at least 0.6, preferably 0.9, to confer a resistance to corrosion by moisture on the glass-containing phosphate base.Type: GrantFiled: November 30, 1995Date of Patent: February 3, 1998Assignee: Societe Europeenne de PropulsionInventors: Rodolphe Delaval, Gerard Palavit, Jacques Rey, Michel Laxague, Jacques Thebault
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Patent number: 5707686Abstract: A method for preventing moisture from being absorbed into an impurity-contained insulating layer is disclosed, including the steps of: forming an impurity-contained insulating layer on a substrate; and coating a material of an alcohol group on the impurity-contained insulating layer, to form an alcohol film.Type: GrantFiled: October 31, 1995Date of Patent: January 13, 1998Assignee: Hyundai Electronics Industries Co., Ltd.Inventor: Sahng Kyoo Lee
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Patent number: 5700525Abstract: Compositions and methods for passivating galvanized metal surfaces are disclosed. The addition of a paraffin wax, preferably emulsified with nonionic surfactants to commercial passivation treatment (non-chrome) enhances passivation.Type: GrantFiled: February 7, 1996Date of Patent: December 23, 1997Assignee: BetzDearborn Inc.Inventors: Jiangbo Ouyang, William L. Harpel
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Patent number: 5690874Abstract: A method of forming a flame retardant cellulose fiber is disclosed which comprises the steps of producing lyocell fiber and incorporating a flame retardant chemical into the fiber while the fiber is in the never-dried condition prior to first drying.Type: GrantFiled: November 7, 1995Date of Patent: November 25, 1997Assignee: Courtaulds Fibres (Holdings) LimitedInventors: Kathryn Diana Bell, Ian Graveson, Timothy John Ollerenshaw
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Patent number: 5681426Abstract: A magnetic structure is formed by depositing a layer of diamond-like carbon onto the exposed surface of an a first material and depositing a layer of second material onto the layer of diamond-like carbon. A photoresist is applied to the exposed surface of the second layer and is patterned in the form of the desire structure. The exposed portions of the second layer are removed with a wet etchant that does not attack the diamond-like carbon layer. Thereafter, any remaining photoresist is removed.Type: GrantFiled: December 13, 1995Date of Patent: October 28, 1997Assignee: Seagate Technology, Inc.Inventors: Allan E. Schultz, L. Vincent Ruscello, William H. Nunne
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Patent number: 5660892Abstract: A metallic film is disclosed. The film has a layer of an organic polymer substrate having an sulfur-reactive surface, to which is adhered a vapor deposited metallic layer. Optionally, a metallic halide layer is formed on the metallic layer to provide depolarizing capacity for the metallic film. Methods of making and using the metallic film are disclosed. Biomedical electrodes, including radiolucent defibrillation electrodes, window films, optical reflectors, and flexible electronic circuits are articles which can use the metallic film as a component.Type: GrantFiled: December 8, 1995Date of Patent: August 26, 1997Assignee: Minnesota Mining and Manufacturing CompanyInventors: William B. Robbins, Leif Christensen, Richard E. Volkmann, Rafael M. Yasis, Laura M. Aguilar
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Patent number: 5645898Abstract: The present invention may provide a method for manufacturing a magnetic recording medium with high reliability by rendering simply a surface of a magnetic recording medium rough. A recording film of a magnetic material is formed on a nonmagnetic substrate, then a multilayered or composite protection film including first and second materials is formed on the recording film, and then selectively etching one of said first and second materials to transform a surface of the recording film into a rough surface.Type: GrantFiled: January 22, 1996Date of Patent: July 8, 1997Assignee: Fujitsu LimitedInventors: Kenji Sato, Iwao Okamoto, Chiaki Okuyama
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Patent number: 5624613Abstract: A slurry is molded from ceramic fibers and/or microparticles to form a soft felt mat which is impregnated with a sol prior to drying the mat. A catalyst for the sol is caused to diffuse into the mat by exposing the mat to the catalyst and subjecting the mat to a soak time during which the catalyst diffuses into the mat and causes the sol to gel. The sol-gel binder forms bonds so that the mat is dimensionally stabilized. The mat is dried to produce ceramic insulation, ceramic insulation having a consistent microstructure and a fully gelled sol-gel binder through its entire thickness.Type: GrantFiled: May 12, 1995Date of Patent: April 29, 1997Assignee: The Boeing CompanyInventors: Michael E. Rorabaugh, Darryl F. Garrigus, Juris Verzemnieks
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Patent number: 5599588Abstract: The present invention concerns a process for obtaining metal halides, in particular rare earth and/or alkali earth halides. This process consists of forming a homogeneous solution by mixing one or more rare earth and/or alkali earth halogenoalkoxides in an anhydrous organic solvent, and hydrolyzing this solution. The novel materials are obtained at room temperature and are in powder, fibre, film or bulk material form.Type: GrantFiled: November 14, 1995Date of Patent: February 4, 1997Assignee: Eastman Kodak CompanyInventor: Oliver J. C. Poncelet
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Patent number: 5569495Abstract: A method of making varistor chips is disclosed. A workpiece of varistor material is sliced into slices of varistor material. The slices are in turn diced to make the varistor chips. The chips are etched in an etchant such as dilute citric acid to remove from their surfaces varistor material damaged during the slicing and/or dicing operations. Otherwise, the damaged varistor material adversely affects the leakage current characteristics of the varistor chips.Type: GrantFiled: May 16, 1995Date of Patent: October 29, 1996Assignee: Raychem CorporationInventors: Anthony C. Evans, Takeshi Tsukada, Shukri J. Souri, Ryan W. Dupon
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Patent number: 5561215Abstract: A method for removing cured sulfur-containing polymer sealants from surfaces is disclosed. The method comprises applying to the surface a sealant remover comprising at least about 50 wt. % of a pyrrolidone, especially N-methyl-2-pyrrolidone, and allowing the cured sulfur-containing polymer and the remover to remain in contact until the cured sulfur-containing polymer is loosened and can be easily removed from the surface. The method of the invention enables fast, effective removal of the sulfur-containing polymer sealants commonly used in the aerospace, construction, and insulating-glass industries.Type: GrantFiled: August 31, 1994Date of Patent: October 1, 1996Assignee: Arco Chemical Technology, L.P.Inventor: Daniel B. Pourreau
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Patent number: 5525378Abstract: A magnetooptical recording medium provided with a first magnetic layer and a second magnetic layer having a higher Curie point and a lower coercive force than the first magnetic layer and being exchange coupled with the first magnetic layer satisfies the relation: ##EQU1## wherein H.sub.H is the coercive force of the first magnetic layer; H.sub.L is the coercive force of the second magnetic layer; M.sub.s is the saturation magnetization of the second magnetic layer; h is the thickness thereof; and .sigma..sub.w is the magnetic wall energy between the first and second magnetic layers.Type: GrantFiled: August 26, 1994Date of Patent: June 11, 1996Assignee: Canon Kabushiki KaishaInventors: Yoichi Osato, Hisaaki Kawade, Eiichi Fujii, Nobuhiro Kasama, Tadashi Kobayashi
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Patent number: 5508061Abstract: A magnetic storage medium includes a substrate, a protective film, and a lubricant film. The substrate includes a magnetic body. The protective film is formed on the substrate and constituted by a carbon thin film having dangling bonds formed on a surface thereof. The lubricant film is coated on the protective film and bonded to some of the dangling bonds. An adsorption site ratio (density of dangling bonds/density of functional groups of lubricant film) which is a ratio of the density of the dangling bonds to the density of functional groups of the lubricant film exceeds 1.Type: GrantFiled: April 12, 1995Date of Patent: April 16, 1996Assignee: NEC CorporationInventor: Masahiro Yanagisawa