Patents by Inventor David P. Harper

David P. Harper 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).

  • SELECTIVE CARBON BINDING ON CARBON QUANTUM DOTS
    Publication number: 20240075453
    Abstract: Carbon quantum dots having selected adsorption of carbon dioxide over nitrogen and oxygen can be prepared by amine modification or nitrogen doping of hydrocarbon-based carbon quantum dots. The carbon quantum dots can be used in various applications for the adsorption of carbon dioxide from the atmosphere and for treating industrial processes that generate carbon dioxide. The carbon quantum dots can be synthesized from lignin and can be paired with a porous activated carbon surface to create a renewable composite material with increased selective adsorption of carbon dioxide.
    Type: Application
    Filed: September 7, 2023
    Publication date: March 7, 2024
    Applicant: University of Tennessee Research Foundation
    Inventors: Michael Broud, David P. Harper, David Keffer
  • Plasticized terephthalate-based polyester blends containing fatty acids or esters thereof
    Patent number: 11279805
    Abstract: A plasticized terephthalate-based polyester blend comprising a terephthalate-based polyester (e.g., polyethylene terephthalate, i.e., PET) homogeneously blended with a fatty acid or ester thereof, wherein said fatty acid or ester thereof is present in said polyester blend in an amount of 1-50 wt %. Also described herein is a method for producing a plasticized terephthalate-based polyester blend, the method comprising melt mixing a terephthalate-based polyester with a fatty acid or ester thereof at a temperature in a range of 230-250° C. to produce said polyester blend, wherein said fatty acid or ester thereof is present in said polyester blend in an amount of 1-50 wt % and is homogeneously blended with said terephthalate-based polyester.
    Type: Grant
    Filed: July 23, 2019
    Date of Patent: March 22, 2022
    Assignees: UT-Battelle, LLC, University of Tennessee Research Foundation
    Inventors: Amit K. Naskar, Kokouvi Akato, Ngoc A. Nguyen, David P. Harper
  • PLASTICIZED TEREPHTHALATE-BASED POLYESTER BLENDS CONTAINING FATTY ACIDS OR ESTERS THEREOF
    Publication number: 20200032007
    Abstract: A plasticized terephthalate-based polyester blend comprising a terephthalate-based polyester (e.g., polyethylene terephthalate, i.e., PET) homogeneously blended with a fatty acid or ester thereof, wherein said fatty acid or ester thereof is present in said polyester blend in an amount of 1-50 wt %. Also described herein is a method for producing a plasticized terephthalate-based polyester blend, the method comprising melt mixing a terephthalate-based polyester with a fatty acid or ester thereof at a temperature in a range of 230-250° C. to produce said polyester blend, wherein said fatty acid or ester thereof is present in said polyester blend in an amount of 1-50 wt % and is homogeneously blended with said terephthalate-based polyester.
    Type: Application
    Filed: July 23, 2019
    Publication date: January 30, 2020
    Inventors: Amit K. Naskar, Kokouvi Akato, Ngoc A. Nguyen, David P. Harper