Patents by Inventor Curtis Alan Johnson
Curtis Alan Johnson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20140162027Abstract: An article includes a silicon-containing region including surface features on a surface thereof. The surface features include depressions, protuberances, or combinations thereof. At least one outer layer overlies the surface of the silicon-containing region. A constituent layer is provided on the surface of the silicon-containing region and between and contacting the silicon-containing region and the at least one outer layer. The constituent layer is formed by constituents of the silicon-containing region and is susceptible to creep within an operating environment of the article. The surface features physically interlock the at least one outer layer with the silicon-containing region through the constituent layer.Type: ApplicationFiled: December 11, 2012Publication date: June 12, 2014Applicant: GENERAL ELECTRIC COMPANYInventors: Peter Joel Meschter, Curtis Alan Johnson, Sairam Sundaram, Julin Wan, Don Mark Lipkin
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Patent number: 8629592Abstract: Disclosed herein is a system including a motor comprising a rotor, a stator and a sealing assembly having at least one joint and a monolithic ceramic separator. Each joint of the sealing assembly is a chemical bond joint, and the monolithic ceramic separator is disposed in a gap between the rotor and the stator of the motor such that the sealing assembly hermetically isolates the rotor and the stator.Type: GrantFiled: June 25, 2009Date of Patent: January 14, 2014Assignee: General Electric CompanyInventors: Curtis Alan Johnson, Myles Standish Peterson, II, Jeremy Daniel Vandam, Timothy James Yosenick, Konrad Roman Weeber, John Russell Yagielski, Wayne Charles Hasz, Martin Mathew Morra
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Publication number: 20130108912Abstract: A battery stack includes a plurality of curved base layers, at least one curved bipolar layer, at least one anode layer disposed between a first curved base layer of the plurality of curved base layers and the at least one curved bipolar layer, at least one cathode layer disposed between the at least one bipolar layer, a second base layer and a plurality of seals. The first base layer and the at least one bipolar layer are provided with one or more seals that seal the first base layer to the at least one bipolar layer without contacting the anode and/or the cathode layer.Type: ApplicationFiled: October 27, 2011Publication date: May 2, 2013Inventors: Shu Ching Quek, Chandra Sekher Yerramalli, Curtis Alan Johnson, Reza Sarrafi-Nour
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Publication number: 20120165200Abstract: Method for joining wires using low resistivity joints is provided. More specifically, methods of joining one or more wires having superconductive filaments, such as magnesium diboride filaments, are provided. The wires are joined by a low resistivity joint to form wires of a desired length for applications, such in medical imaging applications.Type: ApplicationFiled: March 9, 2012Publication date: June 28, 2012Applicant: GENERAL ELECTRIC COMPANYInventors: Judson Sloan Marte, Xianrui Huang, Evangelos Trifon Laskaris, Bruce Alan Knudsen, Thomas Robert Raber, Robert John Zabala, James William Bray, Paul Shadforth Thompson, Sergio Paulo Martins Loureiro, Curtis Alan Johnson, Sylvia Marie Decarr
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Patent number: 8168259Abstract: An article for use in aggressive environments is presented. In one embodiment, the article comprises a substrate and a self-sealing and substantially hermetic sealing layer disposed over the bondcoat. The substrate may be any high-temperature material, including, for instance, silicon-bearing ceramics and ceramic matrix composites. A method for making such articles is also presented. The method comprises providing a substrate; disposing a self-sealing layer over the substrate; and heating the sealing layer to a sealing temperature at which at least a portion of the sealing layer will flow.Type: GrantFiled: October 15, 2010Date of Patent: May 1, 2012Assignee: General Electric CompanyInventors: Reza Sarrafi-Nour, Krishan Lal Luthra, Peter Joel Meschter, Curtis Alan Johnson
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Patent number: 8047773Abstract: A support apparatus for a gas turbine shroud is disclosed. The apparatus includes an outer shroud block having a coupling connectable to a casing of the gas turbine and a shroud component having a forward flange and an aft flange. The shroud component is attached to the outer shroud block via the forward flange and the aft flange. The apparatus further includes a damper disposed between the outer shroud block and the shroud component and a biasing element disposed within the outer shroud block. A translational degree of freedom between the damper and the outer shroud block defines a direction of motion of the damper. The biasing element is in operable connection between the outer shroud block and the shroud component via the damper, a bias force of the biasing element directed along the direction of motion of the damper.Type: GrantFiled: August 23, 2007Date of Patent: November 1, 2011Assignee: General Electric CompanyInventors: Kevin Leon Bruce, Ronald Ralph Cairo, Ronald Phillip Nimmer, Curtis Alan Johnson, Gregory Scot Corman, Herbert Chidsey Roberts, III
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Publication number: 20110203281Abstract: An article comprises a substrate and a coating disposed over the substrate, wherein the coating comprises a monoclinic silicate phase that undergoes no solid state phase transformation reaction in the temperature range from about 1100 degrees Celsius to about 1275 degrees Celsius.Type: ApplicationFiled: February 25, 2010Publication date: August 25, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Reza Sarrafi-Nour, Peter Joel Meschter, Curtis Alan Johnson, Krishan Lal Luthra
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Patent number: 7968217Abstract: An article for use in aggressive environments is presented. In one embodiment, the article comprises a substrate and a self-sealing and substantially hermetic sealing layer disposed over the bondcoat. The substrate may be any high-temperature material, including, for instance, silicon-bearing ceramics and ceramic matrix composites. A method for making such articles is also presented. The method comprises providing a substrate; disposing a self-sealing layer over the substrate; and heating the sealing layer to a sealing temperature at which at least a portion of the sealing layer will flow.Type: GrantFiled: June 26, 2007Date of Patent: June 28, 2011Assignee: General Electric CompanyInventors: Reza Sarrafi-Nour, Krishan Lal Luthra, Peter Joel Meschter, Curtis Alan Johnson
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Publication number: 20110097589Abstract: An article for use at high temperature, such as a component for a gas turbine assembly, is presented. The article comprises a substrate comprising silicon; a bondcoat disposed over the substrate, wherein the bondcoat comprises a silicide of a platinum-group metal; and a topcoat disposed over the bondcoat, wherein the topcoat comprises a ceramic material.Type: ApplicationFiled: October 28, 2009Publication date: April 28, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Peter Joel Meschter, Krishan Lal Luthra, Curtis Alan Johnson
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Patent number: 7910172Abstract: A method for fabricating a component having an environmental barrier coating. The method includes providing a component including silicon having a first coefficient of thermal expansion. A bondcoat is bonded to at least a portion of an outer surface of the component. An intermediate layer having a general composition of RE2Si2O7 is bonded to the bondcoat. The intermediate layer has a second coefficient of thermal expansion matched to the first coefficient of thermal expansion. A protective layer having a general composition of RE2SiO5 is bonded to the intermediate layer. A surface layer is bonded to the protective layer. The surface layer includes RE and has a ratio of RE to oxygen of at least 2:3.Type: GrantFiled: June 13, 2009Date of Patent: March 22, 2011Assignee: General Electric CompanyInventors: Peter Joel Meschter, Curtis Alan Johnson, Krishan Lal Luthra, Reza Sarrafi-Nour
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Patent number: 7910173Abstract: A thermal barrier coating and deposition process for a component intended for use in a hostile thermal environment, such as the turbine, combustor and augmentor components of a gas turbine engine. The TBC has a first coating portion on at least a first surface portion of the component. The first coating portion is formed of a ceramic material to have at least an inner region, at least an outer region overlying the inner region, and a columnar microstructure whereby the inner and outer regions comprise columns of the ceramic material. The columns of the inner region are more closely spaced than the columns of the outer region so that the inner region of the first coating portion is denser than the outer region of the first coating portion, wherein the higher density of the inner region promotes the impact resistance of the first coating portion.Type: GrantFiled: July 31, 2008Date of Patent: March 22, 2011Assignee: General Electric CompanyInventors: Irene Spitsberg, Brett Allen Rohrer Boutwell, Robert William Bruce, Curtis Alan Johnson, Bangalore Aswatha Nagaraj, William Scott Walston, Rudolfo Viguie, Joshua Leigh Miller, Roger Dale Wustman
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Publication number: 20110052925Abstract: An article for use in aggressive environments is presented. In one embodiment, the article comprises a substrate and a self-sealing and substantially hermetic sealing layer comprising an alkaline-earth aluminosilicate disposed over the bondcoat. The substrate may be any high-temperature material, including, for instance, silicon-bearing ceramics and ceramic matrix composites. A method for making such articles is also presented. The method comprises providing a substrate; disposing a self-sealing alkaline-earth aluminosilicate layer over the substrate; and heating the sealing layer to a sealing temperature at which at least a portion of the sealing layer will flow.Type: ApplicationFiled: November 16, 2007Publication date: March 3, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Reza Sarrafi-Nour, Peter Joel Meschter, Curtis Alan Johnson, Krishan Lal Luthra, Larry Steven Rosenzweig
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Publication number: 20110027483Abstract: An article for use in aggressive environments is presented. In one embodiment, the article comprises a substrate and a self-sealing and substantially hermetic sealing layer disposed over the bondcoat. The substrate may be any high-temperature material, including, for instance, silicon-bearing ceramics and ceramic matrix composites. A method for making such articles is also presented. The method comprises providing a substrate; disposing a self-sealing layer over the substrate; and heating the sealing layer to a sealing temperature at which at least a portion of the sealing layer will flow.Type: ApplicationFiled: October 15, 2010Publication date: February 3, 2011Applicant: GENERAL ELECTRIC COMPANYInventors: Reza Sarrafi-Nour, Krishan Lal Luthra, Peter Joel Meschter, Curtis Alan Johnson
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Publication number: 20100327537Abstract: Disclosed herein is a system including a motor comprising a rotor, a stator and a sealing assembly having at least one joint and a monolithic ceramic separator. Each joint of the sealing assembly is a chemical bond joint, and the monolithic ceramic separator is disposed in a gap between the rotor and the stator of the motor such that the sealing assembly hermetically isolates the rotor and the stator.Type: ApplicationFiled: June 25, 2009Publication date: December 30, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Curtis Alan Johnson, Myles Standish Peterson, II, Jeremy Daniel Vandam, Timothy James Yosenick, Konrad Roman Weeber, John Russell Yagielski, Wayne Charles Hasz, Martin Mathew Morra
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Patent number: 7749565Abstract: Disclosed is a coated substrate including a substrate coating applied to at least one substantially flat surface of the substrate, the coating including at least one of an axial concavity and a circumferential curvature, the substrate being configured for disposal parametrically about a moving component.Type: GrantFiled: September 29, 2006Date of Patent: July 6, 2010Assignee: General Electric CompanyInventors: Curtis Alan Johnson, Yuk-Chiu Lau, Joshua Lee Margolies, Herbert Chidsey Roberts, III
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Publication number: 20100159262Abstract: A composition useful as a thermal barrier coating on a superalloy substrate intended for use in hostile thermal environments. The coating comprises zirconia stabilized in a predominately tetragonal phase. The composition includes a ceramic component consisting essentially of zirconia (ZrO2) or a combination of zirconia and hafnia (HfO2) and a stabilizer component comprising, in combination, a first co-stabilizer selected from YbO1.5, HoO1.5, ErO1.5, TmO1.5, LuO1.5, and combinations thereof, and optionally YO1.5, a second co-stabilizer selected from TiO2, PdO2, VO2, GeO2, and combinations thereof, and a third co-stabilizer comprising TaO2.5. The stabilizer component is present in an amount effective to achieve the predominantly tetragonal phase in the coating.Type: ApplicationFiled: December 18, 2008Publication date: June 24, 2010Inventors: Ming Fu, Brian Thomas Hazel, Brett Boutwell, Tobias A. Schaedler, Curtis Alan Johnson, Don M. Lipkin, Douglas G. Konitzer, Venkat S. Venkataramani
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Publication number: 20100159270Abstract: A composition useful as a thermal barrier coating on a superalloy substrate intended for use in hostile thermal environments. The coating comprises zirconia stabilized in a predominately tetragonal phase. The composition includes a ceramic component consisting essentially of zirconia (ZrO2) or a combination of zirconia and hafnia (HfO2) and a stabilizer component comprising, in combination, a first co-stabilizer selected from YbO1.5, HoO1.5, ErO1.5, TmO1.5, LuO1.5, and combinations thereof, and a second co-stabilizer selected from TiO2, PdO2, VO2, GeO2, and combinations thereof. Optionally, the stabilizer component includes Y2O3. The stabilizer component is present in an amount effective to achieve the predominantly tetragonal phase in the coating.Type: ApplicationFiled: December 18, 2008Publication date: June 24, 2010Inventors: Ming Fu, Brian Thomas Hazel, Brett Boutwell, Tobias A. Schaedler, Curtis Alan Johnson, Don M. Lipkin, Venkat S. Venkataramani
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Publication number: 20100124608Abstract: Disclosed is a coated substrate including a substrate coating applied to at least one substantially flat surface of the substrate, the coating including at least one of an axial concavity and a circumferential curvature, the substrate being configured for disposal parametrically about a moving component.Type: ApplicationFiled: September 29, 2006Publication date: May 20, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Curtis Alan Johnson, Yuk-Chiu Lau, Joshua Lee Margolies, Herbert Chidsey Roberts, III
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Publication number: 20100015396Abstract: Disclosed herein is an article comprising a substrate; the substrate comprising a ceramic or a ceramic matrix composite; and a layer comprising coarse particles disposed upon the substrate; the coarse particles having an average particle size of 0.1 to about 1000 micrometers. Disclosed herein too is a method comprising disposing coarse particles on a substrate; the substrate comprising a ceramic or a ceramic matrix composite; the coarse particles having an average particle size of 0.1 to about 1000 micrometers.Type: ApplicationFiled: July 21, 2008Publication date: January 21, 2010Applicant: GENERAL ELECTRIC COMPANYInventors: Curtis Alan Johnson, Reza Sarrafi-Nour, Daniel Gene Dunn
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Publication number: 20090250153Abstract: A method for fabricating a component having an environmental barrier coating. The method includes providing a component including silicon having a first coefficient of thermal expansion. A bondcoat is bonded to at least a portion of an outer surface of the component. An intermediate layer having a general composition of RE2Si2O7 is bonded to the bondcoat. The intermediate layer has a second coefficient of thermal expansion matched to the first coefficient of thermal expansion. A protective layer having a general composition of RE2SiO5 is bonded to the intermediate layer. A surface layer is bonded to the protective layer. The surface layer includes RE and has a ratio of RE to oxygen of at least 2:3.Type: ApplicationFiled: June 13, 2009Publication date: October 8, 2009Applicant: General Electric CompanyInventors: Peter Joel Meschter, Curtis Alan Johnson, Krishan Lal Luthra, Reza Sarrafi-Nour