Patents by Inventor Xiangyu Bi

Xiangyu Bi 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).

  • Dry reagent colorimetric sensing of nanoparticles in aqueous media
    Patent number: 11085906
    Abstract: A composition for dry reagent colorimetric sensing of nanoparticles in aqueous media, including sodium borohydride (NaBH4), methylene blue (MB), and 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) in the form of a powdered mixture. The composition may be formed by combining MB, HEBES, and water to yield an aqueous mixture, removing water from the aqueous mixture to yield a solid mixture, and combining NaBH4 powder with the solid mixture to yield the composition. The composition may be used to detect metallic nanoparticles an aqueous solution by combining the composition with an aqueous solution to yield a test solution, and assessing a concentration of the metallic nanoparticles in the test solution based on absorbance of light by the test solution. The composition may be provided in an assay kit for sensing nanoparticles in aqueous media.
    Type: Grant
    Filed: August 17, 2018
    Date of Patent: August 10, 2021
    Assignees: Arizona Board of Regents on behalf of Arizona State University, University of Washington
    Inventors: Paul K. Westerhoff, Xiangyu Bi, Shahnawaz Sinha, Jonathan D. Posner, Charlie Corredor
  • Dry reagent colorimetric sensing of nanoparticles in aqueous media
    Publication number: 20190056363
    Abstract: A composition for dry reagent colorimetric sensing of nanoparticles in aqueous media, including sodium borohydride (NaBH4), methylene blue (MB), and 4-(2-hydroxyethyl)-1-piperazineethanesulfonic acid (HEPES) in the form of a powdered mixture. The composition may be formed by combining MB, HEBES, and water to yield an aqueous mixture, removing water from the aqueous mixture to yield a solid mixture, and combining NaBH4 powder with the solid mixture to yield the composition. The composition may be used to detect metallic nanoparticles an aqueous solution by combining the composition with an aqueous solution to yield a test solution, and assessing a concentration of the metallic nanoparticles in the test solution based on absorbance of light by the test solution. The composition may be provided in an assay kit for sensing nanoparticles in aqueous media.
    Type: Application
    Filed: August 17, 2018
    Publication date: February 21, 2019
    Inventors: Paul K. Westerhoff, Xiangyu Bi, Shahnawaz Sinha, Jonathan D. Posner, Charlie Corredor