Patents Represented by Attorney, Agent or Law Firm Paula D. Morris & Associates, P.C.
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Patent number: 6881482Abstract: Methods of making microcapsules and microcapsules comprising a core material and a shell material with substantially different dielectric constants and dissipation factors. Exposure to appropriate electromagnetic energy selectively (a) heats the core material with the higher dielectric constant and dissipation factor, directly or indirectly fusing the shell material and forming microcapsules, or (b) hardens polymerized shell material, which has a high dielectric constant and dissipation factor.Type: GrantFiled: August 16, 2002Date of Patent: April 19, 2005Assignee: Southwest Research InstituteInventor: Niraj Vasisht
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Patent number: 6799587Abstract: An apparatus comprising multiple heating, cooling, and/or cleaning zones. The apparatus produces a jet flow of solvent/cleaning fluid onto an article to be cleaned without the need for a pump or compressor. The jet flow provides more effective contaminant removal. The multiple zones result in increased residence time for increased efficiency in separating the solubilized contaminant from the solvent/cleaning fluid.Type: GrantFiled: February 28, 2002Date of Patent: October 5, 2004Assignee: Southwest Research InstituteInventors: Mary C. Marshall, John G. Franjione, Christopher J. Freitas, William T. Roberds, Gordon D. Pollard, Jill Blake
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Patent number: 6764714Abstract: Methods for coating the interior surface of tubular structures having high aspect ratios and tubular structures produced by such methods. The interior surface of the tubular structure is coated by inducing a magnetic field having a given magnitude around a circumference along a length of the tubular structure, applying a bias at a given voltage to the tubular structure, and exposing the interior surface to a precursor material to deposit the precursor material onto the interior surface of the tubular structure.Type: GrantFiled: June 11, 2002Date of Patent: July 20, 2004Assignee: Southwest Research InstituteInventors: Ronghua Wei, Christopher Rincon, James Arps
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Patent number: 6743936Abstract: There are disclosed amphoteric nano-sized metal oxide particles functionalized with silyl esters of a phosphonate and composites thereof with an acrylate-based monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Also disclosed are the method making such functionalized particular by reacting a metal oxide with a silyl ester of a phosphonate in the presence of a non-aqueous solvent and in an inert atmosphere and the method of making the composites wherein the functionalized particles are admixed with an acrylate-based matrix monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Further disclosed is the method of dental repair wherein the composites are applied to a tooth and photopolymerized.Type: GrantFiled: October 19, 2000Date of Patent: June 1, 2004Assignees: Southwest Research Insittute, Board of Regents, The University of Texas SystemInventors: Stephen T. Wellinghoff, Hong Dixon, Henry R. Rawls, Barry K. Norling
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Patent number: 6723177Abstract: A process for treating a chromium coating and/or the surface of a chromium alloy to increase hardness, and/or to decrease coefficient of friction; chromium alloys and/or chromium coatings with surfaces having increased hardness and/or decreased coefficient of friction; and, components comprising chromium alloys and/or chromium coatings with surfaces having increased hardness and/or decreased coefficient of friction.Type: GrantFiled: July 9, 2001Date of Patent: April 20, 2004Assignee: Southwest Research InstituteInventors: Geoffrey Dearnaley, Kevin C. Walter
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Patent number: 6696585Abstract: There are disclosed amphoteric nano-sized metal oxide particles functionalized with silyl esters of a phosphonate and composites thereof with an acrylate-based monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Also disclosed are the method making such functionalized particular by reacting a metal oxide with a silyl ester of a phosphonate in the presence of a non-aqueous solvent and in an inert atmosphere and the method of making the composites wherein the functionalized particles are admixed with an acrylate-based matrix monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Further disclosed is the method of dental repair wherein the composites are applied to a tooth and photopolymerized.Type: GrantFiled: September 22, 2000Date of Patent: February 24, 2004Assignees: Southwest Research Institute, Board of Regents, The University of Texas SystemInventors: Stephen T. Wellinghoff, Hong Dixon, Henry R. Rawls, Barry K. Norling
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Patent number: 6695617Abstract: There are disclosed amphoteric nano-sized metal oxide particles functionalized with silyl esters of a phosphonate and composites thereof with an acrylate-based monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Also disclosed are the method making such functionalized particular by reacting a metal oxide with a silyl ester of a phosphonate in the presence of a non-aqueous solvent and in an inert atmosphere and the method of making the composites wherein the functionalized particles are admixed with an acrylate-based matrix monomer, including liquid crystal monomers photopolymerizable at ambient temperature. Further disclosed is the method of dental repair wherein the composites are applied to a tooth and photopolymerized.Type: GrantFiled: October 18, 2000Date of Patent: February 24, 2004Assignee: Southwest Research InstituteInventors: Stephen T. Wellinghoff, Hong Dixon, Henry R. Rawls, Barry K. Norling
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Patent number: 6677159Abstract: An apparatus and method for visually and continuously monitoring gaseous concentrations of electrophiles such as carbon dioxide. A coating composition comprising an organic binder, filler/pigment, an activator, and carbon dioxide sensitive color indicator interacts with a primed substrate to which it is applied for support. The coated primed substrate may then be used for estimation of carbon dioxide concentration by the detection of a substantially instantaneous and reversible color change of the coated primed substrate.Type: GrantFiled: December 2, 1998Date of Patent: January 13, 2004Assignee: Southwest Research InstituteInventor: William A. Mallow
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Low molecular weight water soluble organic compounds as crystallization point suppressants in brines
Patent number: 6635604Abstract: A brine for use during drilling operations, preferably a completion brine, comprising an amount of a low molecular weight water-soluble organic compound effective to reduce the crystallization point of the brine. The low molecular weight water soluble organic compound can be a variety of compounds, with preferred compounds being ethylene glycol, tripropylene glycol bottoms, and combinations thereof. A method of lowering the crystallization point of the brine using a low molecular weight water soluble organic compound also is provided.Type: GrantFiled: September 20, 2000Date of Patent: October 21, 2003Assignee: Baker Hughes IncorporatedInventors: William S. Halliday, Dennis K. Clapper -
Patent number: 6610436Abstract: Fuel cell electrodes comprising a minimal load of catalyst having maximum catalytic activity and a method of forming such fuel cell electrodes. The preferred method comprises vaporizing a catalyst, preferably platinum, in a vacuum to form a catalyst vapor. A catalytically effective amount of the catalyst vapor is deposited onto a carbon catalyst support on the fuel cell electrode. The electrode preferably is carbon cloth. The method reduces the amount of catalyst needed of a high performance fuel cell electrode to about 0.3 mg/cm2 or less, preferably to about 0.1 mg/cm2. The electrocatalytic layer formed comprises unique, rod-like structures.Type: GrantFiled: September 18, 2000Date of Patent: August 26, 2003Assignee: Gore Enterprise HoldingsInventors: Geoffrey Dearnaley, James H. Arps
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Patent number: 6605234Abstract: Hydroxalkylaminium polysulfides are used to provide cold stability to ammonium polysulfide solutions. Hydroxyalkylaminium sulfides or polysulfides also are used to solubilize unwanted sulfur. Preferred aminium ions are monohydroxyalkylaminium ions, preferably monoethanolaminium ions. When added to an aqueous stream comprising free cyanide ions (including HCN), the polysulfide solution reduces corrosion of metal equipment contacted by the stream by converting the free cyanide ions into thiocyanate ions.Type: GrantFiled: November 23, 1999Date of Patent: August 12, 2003Assignee: Baker Hughes IncorporatedInventors: Glenn L. Roof, Ting S. Go
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Patent number: 6602181Abstract: The invention provides a method for treating drill cuttings, preferably marine cuttings, preferably in situ, so that the cuttings can be discharged into the environment, preferably back into marine waters without causing oxygen depletion of marine sediment. In a preferred embodiment, the treatment emulsifies and then encapsulates free hydrocarbons in the marine cuttings.Type: GrantFiled: April 16, 2001Date of Patent: August 5, 2003Assignee: Baker Hughes IncorporatedInventors: Lirio Quintero, Jose Limia
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Patent number: 6599337Abstract: A method for selecting an effective removal agent and a method of removing drag reducer additive from liquid hydrocarbon fuels, preferably gasoline or jet fuel.Type: GrantFiled: April 18, 2002Date of Patent: July 29, 2003Assignee: Southwest Research InstituteInventor: John Andrew Waynick
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Patent number: 6565913Abstract: An adherent antimicrobial coating and method of making same comprising hydrogenated amorphous carbon and a dispersion of antimicrobial metal ions adapted to maintain a therapeutically effective zone of inhibition.Type: GrantFiled: July 24, 2001Date of Patent: May 20, 2003Assignee: Southwest Research InstituteInventors: James Arps, Geoffrey Dearnaley
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Patent number: 6546782Abstract: An apparatus is described which permits the lubricity of fuel compositions at or near temperatures and pressures experienced by compression ignition fuel injector components during operation in a running engine. The apparatus consists of means to apply a measured force between two surfaces and oscillate them at high frequency while wetted with a sample of the fuel composition heated to an operator selected temperature. Provision is made to permit operation at or near the flash point of the fuel compositions.Type: GrantFiled: September 25, 2000Date of Patent: April 15, 2003Assignee: Southwest Research InstituteInventors: Jose De La Cruz, Paul Lacey
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Patent number: 6548016Abstract: The present invention provides a composition and method for inhibiting hydrogen permeation in metal refinery equipment comprising incorporating into a product stream handled by said equipment a polyamine amide of 3-hydrocarbyl thiopropionic acid in an amount sufficient to inhibit said hydrogen permeation. In a preferred embodiment, the polyamine amide of 3-hydrocarbyl thiopropionic acid is selected from the group consisting of propanamide, N-[2-[2-[3-(dodecenyl)-2,5-dioxo-1-pyrrolidinyl]ethyl]amino]ethyl]-3-[dodecylthio]-2-methyl and 15-thia-5,8,11-triazaheptacosanoic acid, 2-(dodecenyl)-13-methyl-4,12-dioxo, and combinations thereof.Type: GrantFiled: May 2, 1996Date of Patent: April 15, 2003Assignee: Baker Hughes IncorporatedInventor: Bradley G. Borgard
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Patent number: 6514565Abstract: An amorphous carbon film, preferably disposed on and substantially filling the pores in a porous anodized aluminum outer surface, wherein the amorphous carbon film comprises as an integral component an effective amount of a lubricity-increasing agent, preferably sulfur.Type: GrantFiled: April 6, 2001Date of Patent: February 4, 2003Assignee: Southwest Research InstituteInventors: Geoffrey Dearnaley, Mark Van Dyke
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Patent number: 6514915Abstract: Blends of synthetic olefins for use as the continuous phase of fluids selected from the group consisting of drilling, drill-in, and completion fluids. The blends meet EPA discharge requirements while also permitting investigators to clearly discern the presence and quantity of biological markers in reservoir fluid samples—particularly pristane and phytane.Type: GrantFiled: September 29, 2000Date of Patent: February 4, 2003Assignee: Baker Hughes IncorporatedInventors: Timothy Martin Beyer, Steven Kyle Watson
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Patent number: 6451377Abstract: The present invention provides a method for making a high temperature coating comprising applying to a surface a precursor polymer which decomposes to a product selected from the group consisting of a refractory metal carbide and a refractory metal boride, and exposing the precursor polymer to conditions effective to decompose the precursor polymer to the product.Type: GrantFiled: March 27, 2000Date of Patent: September 17, 2002Assignee: Southwest Research InstituteInventors: Partha P. Paul, Stuart T. Schwab
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Patent number: 6448311Abstract: A novel method for making improved cement fluid loss additives comprising copolymers of acrylamide having desirable viscosity and fluid loss control properties. The method combines (1) the use of oxygenated make-up water to dissolve acrylamide monomers, derivatives or mixtures thereof to form a reaction mixture for polymerization of the monomers with (2) a second “condition” or set of conditions. The second “condition” or set of conditions is either (a) using of two heating stages to induce polymerization, or (b) adding a small amount of acrylic acid to the reaction mixture before exposing the reaction mixture to a temperature sufficient to polymerize the monomers. The two heating stages of (a) involve (i) an initial, lower temperature stage followed by (ii) a higher temperature stage.Type: GrantFiled: July 19, 2000Date of Patent: September 10, 2002Assignee: Baker Hughes IncorporatedInventor: Michael L. Walker