Patents by Inventor Endalkachew Sahle-Demessie

Endalkachew Sahle-Demessie 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).

  • Using 4-acetoxyphenol as a substrate for modular hydrolase biosensors
    Patent number: 11422106
    Abstract: Biosensors utilizing 4-acetoxyphenol are described. The biosensors typically include 4-acetoxyphenol in a substrate and utilize one or more enzymes to detect the presence of pollutant agents. Also described are related methods using the biosensors to detect the presence of pollutant agents in water such as As(III).
    Type: Grant
    Filed: February 18, 2020
    Date of Patent: August 23, 2022
    Assignee: United States Government, as represented by the Administrator of the U.S. EPA
    Inventors: Tao Li, Endalkachew Sahle-Demessie
  • USING 4-ACETOXYPHENOL AS A SUBSTRATE FOR MODULAR HYDROLASE BIOSENSORS
    Publication number: 20200264124
    Abstract: Biosensors utilizing 4-acetoxyphenol are described. The biosensors typically include 4-acetoxyphenol in a substrate and utilize one or more enzymes to detect the presence of pollutant agents. Also described are related methods using the biosensors to detect the presence of pollutant agents in water such as As(III).
    Type: Application
    Filed: February 18, 2020
    Publication date: August 20, 2020
    Inventors: Tao LI, Endalkachew SAHLE-DEMESSIE
  • Process using compact embedded electron induced ozonation and activation of nanostructured titanium dioxide photocatalyst for photocatalytic oxidation
    Patent number: 8404183
    Abstract: A reactor produces a surface corona for emitting UV light and for the production of ozone by passing air or oxygen through the surface corona. The emitted UV light activates a photocatalyst coated on a surface facing a surface with embedded electrodes which generate the surface corona. The photocatalyst is a thin film of nanoparticle TiO2 with primary particle size of 0.02 to 0.2 ?m was deposited on a substrate by a flame aerosol method. The method combines ozonation and photocatalysis to provide effective and efficient oxidation of alcohols and hydrocarbons to value added products. The method can also be used for air and water cleaning.
    Type: Grant
    Filed: August 20, 2009
    Date of Patent: March 26, 2013
    Assignee: The United States of America as represented by the Administrator of the U.S. Environmental Protection Agency
    Inventors: Endalkachew Sahle-Demessie, Pratim Biswas, Unnikrishnan R. Pillai, Chulhan Kim
  • Process using compact embedded electron induced ozonation and activation of nanostructured titanium dioxide photocatalyst for photocatalytic oxidation
    Patent number: 7691342
    Abstract: A reactor produces a surface corona for emitting UV light and for the production of ozone by passing air or oxygen through the surface corona. The emitted UV light activates a photocatalyst coated on a surface facing a surface with embedded electrodes which generate the surface corona. The photocatalyst is a thin film of nanoparticle TiO2 with primary particle size of 0.02 to 0.2 ?m was deposited on a substrate by a flame aerosol method. The method combines ozonation and photocatalysis to provide effective and efficient oxidation of alcohols and hydrocarbons to value added products. The method can also be used for air and water cleaning.
    Type: Grant
    Filed: April 28, 2006
    Date of Patent: April 6, 2010
    Assignee: The United States of America as represented by the U.S. Environmental Protection Agency
    Inventors: Endalkachew Sahle-Demessie, Pratim Biswas, Unnikrishnan R. Pillai, Chulhan Kim
  • PROCESS USING COMPACT EMBEDDED ELECTRON INDUCED OZONATION AND ACTIVATION OF NANOSTRUCTURED TITANIUM DIOXIDE PHOTOCATALYST FOR PHOTOCATALYTIC OXIDATION
    Publication number: 20090301859
    Abstract: A reactor produces a surface corona for emitting UV light and for the production of ozone by passing air or oxygen through the surface corona. The emitted UV light activates a photocatalyst coated on a surface facing a surface with embedded electrodes which generate the surface corona. The photocatalyst is a thin film of nanoparticle TiO2 with primary particle size of 0.02 to 0.2 ?m was deposited on a substrate by a flame aerosol method. The method combines ozonation and photocatalysis to provide effective and efficient oxidation of alcohols and hydrocarbons to value added products. The method can also be used for air and water cleaning.
    Type: Application
    Filed: August 20, 2009
    Publication date: December 10, 2009
    Applicant: The United States of America as represented by the United States Environmental Protection Agency
    Inventors: Endalkachew SAHLE-DEMESSIE, Pratim Biswas, Unnikrishnan R. Pillai, Chulhan Kim
  • Process using compact embedded electron induced ozonation and activation of nanostructured titanium dioxide photocatalyst for photocatalytic oxidation
    Publication number: 20070251811
    Abstract: A reactor produces a surface corona for emitting UV light and for the production of ozone by passing air or oxygen through the surface corona. The emitted UV light activates a photocatalyst coated on a surface facing a surface with embedded electrodes which generate the surface corona. The photocatalyst is a thin film of nanoparticle TiO2 with primary particle size of 0.02 to 0.2 ?m was deposited on a substrate by a flame aerosol method. The method combines ozonation and photocatalysis to provide effective and efficient oxidation of alcohols and hydrocarbons to value added products. The method can also be used for air and water cleaning.
    Type: Application
    Filed: April 28, 2006
    Publication date: November 1, 2007
    Applicant: The United States of America as represented by the United States Environmental Protection Agency
    Inventors: Endalkachew Sahle-Demessie, Pratim Biswas, Unnikrishnan Pillai, Chulhan Kim
  • Process for photo-induced selective oxidation of organic chemicals to alcohols, ketones and aldehydes using flame deposited nano-structured photocatalyst
    Patent number: 6777374
    Abstract: Organic molecules are partially oxidized in that the gas phase on supported and immobilized photocatalysts deposited having a nanostructure. the photocatalysts are semiconductors such as titanium dioxide and are preferentially coated onto a substrate by flame aerosol coating.
    Type: Grant
    Filed: July 18, 2001
    Date of Patent: August 17, 2004
    Assignee: The United States of America as represented by the Environmental Protection Agency
    Inventors: Endalkachew Sahle-Demessie, Pratim Biswas, Michale A. Gonzalez, Zhong-Min Wang, Subhas K. Sikdar
  • Process for photo-induced partial oxidation of organic chemicals to alcohols, ketones, and aldehydes using flame deposited non-structured photocatalysts
    Publication number: 20020029955
    Abstract: Organic molecules are partially oxidized in that the gas phase on supported and immobilized photocatalysts deposited having a nanostructure. the photocatalysts are semiconductors such as titanium dioxide and are preferentially coated onto a substrate by flame aerosol coating.
    Type: Application
    Filed: July 18, 2001
    Publication date: March 14, 2002
    Inventors: Endalkachew Sahle-Demessie, Pratim Biswas, Michale A. Gonzalez, Zhong-Min Wang, Subhas K. Sikdar
  • Process for removing chemical preservatives from wood using supercritical fluid extraction
    Patent number: 5364475
    Abstract: The process of the present invention is directed to the remediation of wood that has been treated with a preservative, such as pentachlorophenol or other non-ionic organic biocides, using supercritical fluids, with or without the addition of modifiers.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: November 15, 1994
    Assignee: State of Oregon acting by and through the State Board of Higher Education on behalf of Oregon State University
    Inventors: Keith L. Levien, Jeffrey J. Morrell, Satish Kumar, Endalkachew Sahle-Demessie