Patents by Inventor Daoping Guo

Daoping Guo 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).

  • Sustainable two-component annular grout composition and method for use with a tunnel-boring machine
    Patent number: 11673835
    Abstract: A method and composition are provided for backfilling the annular gap created as a tunnel boring machine advances through the ground. The fill material is comprised of two components that are combined and mixed together just prior to entering the annular gap. The first component is non-cement slurry consisting of a fluidized bed combustion ash such as coal ash. The second component consists of an alkali silicate such as sodium silicate. Additionally, ordinary Portland cement and/or metakaolin can be added to the grout composition.
    Type: Grant
    Filed: January 31, 2022
    Date of Patent: June 13, 2023
    Assignee: PQ, LLC
    Inventors: Michael McDonald, Kelly Paul Short, Kenneth A. Berg, Flavio Ernesto Ribeiro, Jim Moran, Peter Marinescu, Daoping Guo
  • SUSTAINABLE TWO-COMPONENT ANNULAR GROUT COMPOSITION AND METHOD FOR USE WITH A TUNNEL-BORING MACHINE
    Publication number: 20220274881
    Abstract: A method and composition are provided for backfilling the annular gap created as a tunnel boring machine advances through the ground. The fill material is comprised of two components that are combined and mixed together just prior to entering the annular gap. The first component is non-cement slurry consisting of a fluidized bed combustion ash such as coal ash. The second component consists of an alkali silicate such as sodium silicate. Additionally, ordinary Portland cement and/or metakaolin can be added to the grout composition.
    Type: Application
    Filed: January 31, 2022
    Publication date: September 1, 2022
    Inventors: Michael McDonald, Kelly Paul Short, Kenneth A. Berg, Flavio Ernesto Ribeiro, Jim Moran, Peter Marinescu, Daoping Guo