Patents by Inventor Anastasios Angelopoulos
Anastasios Angelopoulos 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: 20220015982Abstract: An augmented reality system for providing depth perspective includes a sensor system that provides spatial data of objects in a surrounding environment of a user. A computer processor system calculates spatial information of the objects from the spatial data received the sensor system. The computer processor system determines a depth-to-color mapping in which distance of objects from the user is mapped to a predetermined viewable representation. The system also includes a head mountable display that displays the depth-to-color mapping to the user. Characteristically, distances of the objects from the user are rendered to allow at least partial viewability of the object by the user. A method utilizing the augmented reality system is also provided.Type: ApplicationFiled: December 2, 2019Publication date: January 20, 2022Applicant: UNIVERSITY OF SOUTHERN CALIFORNIAInventors: Mark S. HUMAYUN, Anastasios ANGELOPOULOS
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Patent number: 10418641Abstract: Provided are processes for preparing a thermodynamically stable PtBi2 alloy nanoparticle. In certain aspects, the process comprises preparing an aqueous mixture, with the aqueous mixture comprising: an inorganic compound comprising SnCl2; an inorganic compound comprising Bi; and HCl. The process further comprises adding PtCl4 to the mixture. The process results in the spontaneous reduction of Bi and Pt. Excess SnCl2 is adsorbed as a ligand at the surface of the PtBi2 alloy nanoparticle, which serves to stabilize the nanoparticle. Another aspect provides a thermodynamically stable PtBi2 nanoparticle. The nanoparticle comprises a core comprising a PtBi2 alloy. The nanoparticle further comprises a shell at least partially encapsulating the core, with the shell comprising stannous chloride. The thermodynamically stable PtBi2 nanoparticle has a negative charge.Type: GrantFiled: December 16, 2016Date of Patent: September 17, 2019Inventor: Anastasios Angelopoulos
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Patent number: 9921167Abstract: An optical sensor for monitoring an environmental condition, the optical sensor comprising a perfluorosulfonate ionomer membrane comprising a solution, wherein the solution comprises a transition metal-free dye component, wherein exposure of the optical sensor to a specific environmental condition produces a color shift on the optical sensor.Type: GrantFiled: October 23, 2015Date of Patent: March 20, 2018Assignee: University of CincinnatiInventors: Anastasios Angelopoulos, Subasri M Ayyadurai, Jonathan A. Bernstein, Daniel S. Kanter
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Publication number: 20170244112Abstract: Provided are processes for preparing a thermodynamically stable PtBi2 alloy nanoparticle. In certain aspects, the process comprises preparing an aqueous mixture, with the aqueous mixture comprising: an inorganic compound comprising SnCl2; an inorganic compound comprising Bi; and HCl. The process further comprises adding PtCl4 to the mixture. The process results in the spontaneous reduction of Bi and Pt. Excess SnCl2 is adsorbed as a ligand at the surface of the PtB2 alloy nanoparticle, which serves to stabilize the nanoparticle. Another aspect provides a thermodynamically stable PtBi2 nanoparticle. The nanoparticle comprises a core comprising a PtBi2 alloy. The nanoparticle further comprises a shell at least partially encapsulating the core, with the shell comprising stannous chloride. The thermodynamically stable PtB2 nanoparticle has a negative charge.Type: ApplicationFiled: December 16, 2016Publication date: August 24, 2017Inventor: Anastasios Angelopoulos
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Patent number: 9640805Abstract: A process including coating a fuel cell component with an aqueous solution including a polyelectrolyte polymer.Type: GrantFiled: October 5, 2006Date of Patent: May 2, 2017Assignee: GM Global Technology Operations LLCInventors: Anastasios Angelopoulos, Scott L. Peters
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Publication number: 20160041105Abstract: An optical sensor for monitoring an environmental condition, the optical sensor comprising a perfluorosulfonate ionomer membrane comprising a solution, wherein the solution comprises a transition metal-free dye component, wherein exposure of the optical sensor to a specific environmental condition produces a color shift on the optical sensor.Type: ApplicationFiled: October 23, 2015Publication date: February 11, 2016Applicant: UNIVERSITY OF CINCINNATIInventors: Anastasios Angelopoulos, Subasri M Ayyadurai, Jonathan A. Berstein, Daniel S. Kanter
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Patent number: 8628819Abstract: A process comprising: submerging a fuel cell bipolar plate in a bath comprising nanoparticles and a liquid phase comprising a nanoparticles dispersion agent and wherein the bipolar plate includes an upper surface having a plurality of lands and channels formed therein; removing the fuel cell bipolar plate from the bath so that a coating comprising nanoparticles adheres to the fuel cell bipolar plate; while the coating is wet and before the coating is dried and solidified, removing the coating comprising nanoparticles from the lands of the bipolar plate, leaving coating comprising nanoparticle in the channels; and drying the coating in the channels.Type: GrantFiled: January 31, 2007Date of Patent: January 14, 2014Assignee: GM Global Technology Operations LLCInventors: Scott L. Peters, Anastasios Angelopoulos
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Patent number: 8435627Abstract: Embodiments of a coated substrate comprise a substrate (100) with a multi-functional multi-layer nanoparticle coating (105) having a thickness of up to about 500 nm thereon. The nanoparticle coating (105) comprises an ionic polyelectrolyte layer (110), and a mixed colloid layer disposed over the polyelectrolyte layer (110). The mixed colloid layer comprises hydrophilic colloid ions (130) and conductive colloid ions (120) which is coupled through electrostatic or non-electrostatic forces, and the conductive colloid ions (120), the hydrophilic colloid ions (130), or both are coupled to the polyelectrolyte layer (110).Type: GrantFiled: February 5, 2008Date of Patent: May 7, 2013Assignee: University of CincinnatiInventor: Anastasios Angelopoulos
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Patent number: 8227076Abstract: Embodiments of a coated substrate comprise a substrate (100) and a multi-layer multi-functional nanoparticle coating (105) having a thickness of up to about 500 nm thereon. The nanoparticle coating (105) comprises an ionic polyelectrolyte layer (110), and an ionic multi-colloid layer disposed over the polyelectrolyte layer (110). The multi-colloid layer comprises hydrophilic colloid ions (130) disposed over and coupled to the polyelectrolyte layer (110), conductive colloid ions (120) disposed over and coupled to the polyelectrolyte layer (110). The conductive colloid ions (120) are separated from the hydrophilic colloid ions (130) by repulsive forces therebetween.Type: GrantFiled: February 5, 2008Date of Patent: July 24, 2012Assignee: University of CincinnatiInventor: Anastasios Angelopoulos
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Publication number: 20120148813Abstract: Embodiments of a coated substrate comprise a substrate (100) and a multi-layer multi-functional nanoparticle coating (105) having a thickness of up to about 500 nm thereon. The nanoparticle coating (105) comprises an ionic polyelectrolyte layer (110), and an ionic multi-colloid layer disposed over the polyelectrolyte layer (110). The multi-colloid layer comprises hydrophilic colloid ions (130) disposed over and coupled to the polyelectrolyte layer (110), conductive colloid ions (120) disposed over and coupled to the polyelectrolyte layer (110). The conductive colloid ions (120) are separated from the hydrophilic colloid ions (130) by repulsive forces therebetween.Type: ApplicationFiled: February 5, 2008Publication date: June 14, 2012Applicant: UNIVERSITY OF CINCINNATIInventor: Anastasios Angelopoulos
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Publication number: 20120135211Abstract: Embodiments of a coated substrate comprise a substrate (100) with a multi-functional multi-layer nanoparticle coating (105) having a thickness of up to about 500 nm thereon. The nanoparticle coating (105) comprises an ionic polyelectrolyte layer (110), and a mixed colloid layer disposed over the polyelectrolyte layer (110). The mixed colloid layer comprises hydrophilic colloid ions (130) and conductive colloid ions (120) which is coupled through electrostatic or non-electrostatic forces, and the conductive colloid ions (120), the hydrophilic colloid ions (130), or both are coupled to the polyelectrolyte layer (110).Type: ApplicationFiled: February 5, 2008Publication date: May 31, 2012Applicant: UNIVERSITY OF CINCINNATIInventor: Anastasios Angelopoulos
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Patent number: 7892596Abstract: A process including coating a fuel cell component using a coating solution including nanoparticles.Type: GrantFiled: December 8, 2006Date of Patent: February 22, 2011Assignee: GM Global Technology Operations LLCInventors: Anastasios Angelopoulos, Scott L. Peters
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Publication number: 20100003764Abstract: An optical sensor for monitoring an environmental condition, the optical sensor comprising a perfluorosulfonate ionomer membrane comprising a solution, wherein the solution comprises a transition metal-free dye component, wherein exposure of the optical sensor to a specific environmental condition produces a color shift on the optical sensor.Type: ApplicationFiled: July 2, 2009Publication date: January 7, 2010Inventors: Anastasios Angelopoulos, Subasri M Ayyadurai, Jonathan A. Berstein, Daniel Kanter
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Publication number: 20090211522Abstract: A method for fabricating diffusion media for a fuel cell that includes using variable frequency microwaves for heating the diffusion media after it has been coated with a solvent including fluorocarbon particles to provide broader control over the distribution of the fluorocarbon on the diffusion media. In one embodiment, a carbon fiber substrate is dipped in a solution including the fluorocarbon particles and a surfactant. The wet and coated substrate is then dried using the microwave radiation, where the frequency of the microwave radiation is varied to increase or control the dispersion of the fluorocarbon particles and the hydrophobicity of the diffusion media. In one embodiment, the microwave radiation is varied in frequency between 500 MHz and 1000 GHZ.Type: ApplicationFiled: February 21, 2008Publication date: August 27, 2009Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Stephen Perl, Anastasios Angelopoulos
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Publication number: 20070202247Abstract: A process comprising: submerging a fuel cell bipolar plate in a bath comprising nanoparticles and a liquid phase comprising a nanoparticles dispersion agent and wherein the bipolar plate includes an upper surface having a plurality of lands and channels formed therein; removing the fuel cell bipolar plate from the bath so that a coating comprising nanoparticles adheres to the fuel cell bipolar plate; while the coating is wet and before the coating is dried and solidified, removing the coating comprising nanoparticles from the lands of the bipolar plate, leaving coating comprising nanoparticle in the channels; and drying the coating in the channels.Type: ApplicationFiled: January 31, 2007Publication date: August 30, 2007Applicant: GM Global Technology Operations, Inc.Inventors: Scott Peters, Anastasios Angelopoulos
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Publication number: 20070141238Abstract: A process including coating a fuel cell component using a coating solution including nanoparticles.Type: ApplicationFiled: December 8, 2006Publication date: June 21, 2007Applicant: GM Global Technology Operations, Inc.Inventors: Anastasios Angelopoulos, Scott Peters
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Publication number: 20070098908Abstract: A process including coating a fuel cell component with an aqueous solution including a polyelectrolyte polymer.Type: ApplicationFiled: October 5, 2006Publication date: May 3, 2007Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.Inventors: Anastasios Angelopoulos, Scott Peters
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Patent number: 7132191Abstract: A method of addressing one MEA failure mode by controlling MEA catalyst layer overlap, and the apparatus formed thereby is disclosed. The present invention addresses a feature of membrane electrode assembly (MEA) architecture that is associated with field failures due to the loss of ionomer from the edges of the electrolyte. To address ionomer degradation, the present invention provides a MEA design in which the cathode catalyst edges are closer than the anode catalyst edges to the edges of the electrolyte.Type: GrantFiled: September 17, 2003Date of Patent: November 7, 2006Assignee: General Motors CorporationInventors: John P. Healy, Anastasios Angelopoulos, Clark G Hochgraf
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Publication number: 20050084742Abstract: Favorable performance of diffusion media in fuel cells has found to be correlated to a parameter (the C/F ratio) that relates to a spatial and thickness distribution of the hydrophobic fluoropolymer on the carbon fiber substrate structure of the medium. Suitable diffusion media may be chosen from among commercially coated diffusion media by measuring the C/F ratio by means of energy dispersive spectroscopy, and choosing the diffusion media if the value of the C/F ratio is within the preferred range. Alternatively, the diffusion media may be manufactured with an improved process that consistently yields values of C/F ratio in the desired range.Type: ApplicationFiled: August 23, 2004Publication date: April 21, 2005Inventors: Anastasios Angelopoulos, Chunxin Ji, Mark Mathias
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Publication number: 20050058870Abstract: A method of addressing one MEA failure mode by controlling MEA catalyst layer overlap, and the apparatus formed thereby is disclosed. The present invention addresses a feature of membrane electrode assembly (MEA) architecture that is associated with field failures due to the loss of ionomer from the edges of the electrolyte. To address ionomer degradation, the present invention provides a MEA design in which the cathode catalyst edges are closer than the anode catalyst edges to the edges of the electrolyte.Type: ApplicationFiled: September 17, 2003Publication date: March 17, 2005Inventors: John Healy, Anastasios Angelopoulos, Clark Hochgraf