Patents by Inventor Pantcho Stoyanov
Pantcho Stoyanov 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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Patent number: 11802330Abstract: A formation method is provided. During this formation method, a metallic substrate is provided. A coating is deposited onto the metallic substrate using a suspension plasma spray process. The coating is formed from or otherwise includes copper oxide.Type: GrantFiled: August 22, 2022Date of Patent: October 31, 2023Assignees: The Royal Institution for the Advancement of Learning/McGill Concordia University, Concordia University, Pratt & Whitney Canada Corp.Inventors: Joël Larose, Amit Roy, Navid Sharifi, Pantcho Stoyanov, Christian Moreau, Richard Chromik, Mary Makowiec
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Patent number: 11480500Abstract: A method of evaluating the quality of a surface on a component comprises the steps of (a) contacting a surface of a component with a media and imprinting qualities of the surface with the media; and (b) evaluating the imprint to determine the quality of the surface of the component.Type: GrantFiled: January 6, 2020Date of Patent: October 25, 2022Assignee: Raytheon Technologies CorporationInventors: Pantcho Stoyanov, Elizabeth V. Favela
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Publication number: 20220120187Abstract: Disclosed is a method of making a seal comprising fabricating a seal body that includes a first friction surface including nickel and cobalt. The first friction surface on the seal body is contacted with a metal counter-body surface including nickel. Pressure and heat is applied between the seal body and the counter-body, and motion is applied between the seal body and the counter-body with respect to each other in a direction parallel to the first friction surface, followed by separating the seal from the counter-body.Type: ApplicationFiled: December 27, 2021Publication date: April 21, 2022Inventor: Pantcho Stoyanov
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Patent number: 11208907Abstract: Disclosed is a method of making a seal comprising fabricating a seal body that includes a first friction surface including nickel and cobalt. The first friction surface on the seal body is contacted with a metal counter-body surface including nickel. Pressure and heat is applied between the seal body and the counter-body, and motion is applied between the seal body and the counter-body with respect to each other in a direction parallel to the first friction surface, followed by separating the seal from the counter-body.Type: GrantFiled: July 13, 2017Date of Patent: December 28, 2021Assignee: RAYTHEON TECHNOLOGIES CORPORATIONInventor: Pantcho Stoyanov
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Patent number: 11123801Abstract: A cutting tool made by an additive manufacturing process is disclosed. The cutting tool has an exterior surface and an enclosed interior cavity defined by one or more inwardly facing surfaces. The interior cavity may have internal supports such as a lattice or a honeycomb structure. The cutting tool may be an insert, drill or endmill with coolant holes.Type: GrantFiled: April 3, 2018Date of Patent: September 21, 2021Assignee: KENNAMETAL INC.Inventor: Pantcho Stoyanov
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Patent number: 11065862Abstract: Methods of making sintered articles from powder metal carbide compositions by additive manufacturing techniques are described herein. Sintered carbide articles fabricated by such additive manufacturing techniques, in some embodiments, exhibit densities equaling articles formed according to conventional techniques employed in powder metallurgy. For example, a method of manufacturing an article comprises providing sintered cemented carbide powder comprising a hard particle phase including tungsten carbide and a metallic binder phase and forming the sintered cemented carbide powder into a green article by one or more additive manufacturing techniques. The green article is sintered to provide a sintered article having density greater than 90% theoretical full density, wherein the green article has a density less than 50% theoretical full density prior to sintering.Type: GrantFiled: November 20, 2018Date of Patent: July 20, 2021Assignee: KENNAMETAL INC.Inventors: Pantcho Stoyanov, Paul Prichard
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Patent number: 10808712Abstract: Disclosed is a rotating component for a turbine engine including a first rotating component having a first snap surface and a second rotating component having a second snap surface wherein the first snap surface is configured to interlock with the second snap surface, and further wherein at least one of the first snap surface and the second snap surface have a friction enhancing material.Type: GrantFiled: March 22, 2018Date of Patent: October 20, 2020Assignee: RAYTHEON TECHNOLOGIES CORPORATIONInventors: Pantcho Stoyanov, William J. Joost
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Patent number: 10760686Abstract: Aspects are directed to a tribological and creep resistant system configured to operate at temperature in excess of 750° C., comprising: a piston seal that includes a nickel base alloy, where the nickel base alloy includes a Ni3(Al,X) type precipitated phase in an amount greater than 40% by volume. Aspects are directed to a system comprising: a piston seal that includes a cobalt-based alloy. Aspects are directed to a method comprising: heat treating an ingot of a nickel base alloy that includes coarsening a precipitated phase to facilitate forging or wrought forming the ingot, machining the ingot to include a substantially flat surface, and processing the ingot to generate a piston seal.Type: GrantFiled: October 11, 2017Date of Patent: September 1, 2020Assignee: Raytheon Technologies CorporationInventors: Dilip M. Shah, Pantcho Stoyanov, Chris Vargas
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Publication number: 20200141836Abstract: A method of evaluating the quality of a surface on a component comprises the steps of (a) contacting a surface of a component with a media and imprinting qualities of the surface with the media; and (b) evaluating the imprint to determine the quality of the surface of the component.Type: ApplicationFiled: January 6, 2020Publication date: May 7, 2020Inventors: Pantcho Stoyanov, Elizabeth V. Favela
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Patent number: 10544698Abstract: An embodiment of a gas turbine engine component includes an abrasive coating disposed on at least a portion of a sealing region. The abrasive coating includes an inner abrasive region disposed outward of the sealing region in a coating thickness direction, and an outer abrasive region disposed outward of the inner abrasive region in the coating thickness direction. The inner abrasive region includes abrasive particles retained in an inner matrix, and the outer abrasive region includes abrasive particles retained in an outer matrix. At least one of the inner matrix and the outer matrix is modified with a first indicator material. At least one aspect of the first indicator material corresponds to a thickness range of the abrasive coating being within the inner thickness region or the outer thickness region.Type: GrantFiled: June 7, 2017Date of Patent: January 28, 2020Assignee: United Technologies CorporationInventors: Pantcho Stoyanov, Christopher W. Strock, Agnieszka M. Wusatowska-Sarnek
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Patent number: 10527524Abstract: A method of evaluating the quality of a surface on a component comprises the steps of (a) contacting a surface of a component with a media and imprinting qualities of the surface with the media; and (b) evaluating the imprint to determine the quality of the surface of the component.Type: GrantFiled: October 26, 2016Date of Patent: January 7, 2020Assignee: United Technologies CorporationInventors: Pantcho Stoyanov, Elizabeth V. Favela
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Publication number: 20190293079Abstract: Disclosed is a rotating component for a turbine engine including a first rotating component having a first snap surface and a second rotating component having a second snap surface wherein the first snap surface is configured to interlock with the second snap surface, and further wherein at least one of the first snap surface and the second snap surface have a friction enhancing material.Type: ApplicationFiled: March 22, 2018Publication date: September 26, 2019Inventors: Pantcho Stoyanov, William J. Joost
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Publication number: 20190186281Abstract: An air seal in a gas turbine engine includes a substrate. A bond coating layer is adhered to the substrate. An abradable layer is adhered to the bond coating layer. The abradable layer comprises a metal matrix discontinuously filled with a lubricious oxide solid lubricant filler.Type: ApplicationFiled: December 20, 2017Publication date: June 20, 2019Applicant: United Technologies CorporationInventors: Pantcho Stoyanov, Christopher W. Strock, Kevin Seymour
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Publication number: 20190107202Abstract: Aspects are directed to a tribological and creep resistant system configured to operate at temperature in excess of 750° C., comprising: a piston seal that includes a nickel base alloy, where the nickel base alloy includes a Ni3(Al,X) type precipitated phase in an amount greater than 40% by volume. Aspects are directed to a system comprising: a piston seal that includes a cobalt-based alloy. Aspects are directed to a method comprising: heat treating an ingot of a nickel base alloy that includes coarsening a precipitated phase to facilitate forging or wrought forming the ingot, machining the ingot to include a substantially flat surface, and processing the ingot to generate a piston seal.Type: ApplicationFiled: October 11, 2017Publication date: April 11, 2019Inventors: Dilip M. Shah, Pantcho Stoyanov, Chris Vargas
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Publication number: 20190084290Abstract: Methods of making sintered articles from powder metal carbide compositions by additive manufacturing techniques are described herein. Sintered carbide articles fabricated by such additive manufacturing techniques, in some embodiments, exhibit densities equaling articles formed according to conventional techniques employed in powder metallurgy. For example, a method of manufacturing an article comprises providing sintered cemented carbide powder comprising a hard particle phase including tungsten carbide and a metallic binder phase and forming the sintered cemented carbide powder into a green article by one or more additive manufacturing techniques. The green article is sintered to provide a sintered article having density greater than 90% theoretical full density, wherein the green article has a density less than 50% theoretical full density prior to sintering.Type: ApplicationFiled: November 20, 2018Publication date: March 21, 2019Inventors: Pantcho STOYANOV, Paul PRICHARD
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Publication number: 20190017401Abstract: Disclosed is a method of making a seal comprising fabricating a seal body that includes a first friction surface including nickel and cobalt. The first friction surface on the seal body is contacted with a metal counter-body surface including nickel. Pressure and heat is applied between the seal body and the counter-body, and motion is applied between the seal body and the counter-body with respect to each other in a direction parallel to the first friction surface, followed by separating the seal from the counter-body.Type: ApplicationFiled: July 13, 2017Publication date: January 17, 2019Inventor: Pantcho Stoyanov
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Patent number: 10144065Abstract: Methods of making sintered articles from powder metal carbide compositions by additive manufacturing techniques are described herein. Sintered carbide articles fabricated by such additive manufacturing techniques, in some embodiments, exhibit densities equaling articles formed according to conventional techniques employed in powder metallurgy. For example, a method of manufacturing an article comprises providing sintered cemented carbide powder comprising a hard particle phase including tungsten carbide and a metallic binder phase and forming the sintered cemented carbide powder into a green article by one or more additive manufacturing techniques. The green article is sintered to provide a sintered article having density greater than 90% theoretical full density, wherein the green article has a density less than 50% theoretical full density prior to sintering.Type: GrantFiled: January 7, 2015Date of Patent: December 4, 2018Assignee: KENNAMETAL INC.Inventors: Pantcho Stoyanov, Paul Prichard
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Publication number: 20180221962Abstract: A cutting tool made by an additive manufacturing process is disclosed. The cutting tool has an exterior surface and an enclosed interior cavity defined by one or more inwardly facing surfaces. The interior cavity may have internal supports such as a lattice or a honeycomb structure. The cutting tool may be an insert, drill or endmill with coolant holes.Type: ApplicationFiled: April 3, 2018Publication date: August 9, 2018Inventor: Pantcho Stoyanov
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Patent number: 9975182Abstract: A cutting tool made by an additive manufacturing process is disclosed. The cutting tool has an exterior surface and an enclosed interior cavity defined by one or more inwardly facing surfaces. The interior cavity may have internal supports such as a lattice or a honeycomb structure. The cutting tool may be an insert, drill or endmill with coolant holes.Type: GrantFiled: May 13, 2015Date of Patent: May 22, 2018Assignee: KENNAMETAL INC.Inventor: Pantcho Stoyanov
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Publication number: 20180113053Abstract: A method of evaluating the quality of a surface on a component comprises the steps of (a) contacting a surface of a component with a media and imprinting qualities of the surface with the media; and (b) evaluating the imprint to determine the quality of the surface of the component.Type: ApplicationFiled: October 26, 2016Publication date: April 26, 2018Inventors: Pantcho Stoyanov, Elizabeth V. Favela