Patents by Inventor Yuqing Chang

Yuqing Chang 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).

  • Aerosol particulate matter collecting device and collecting method
    Patent number: 11772018
    Abstract: The aerosol particulate matter collecting device includes a shell, a first electric field component, a second electric field component and the collection unit. The first electric field component is connected to the shell and forms a first electric field area, the second electric field component is connected to the shell and forms a second electric field area, the second electric field component includes a first plate and a second plate, and the electric property of the first plate is opposite to that of the first electric charges; a bottom plate of the collection unit is located between the first plate and the second plate, protrusions are arranged on the bottom plate, a flow channel for accommodating collecting liquid is formed in the bottom plate, the protrusions are configured to enable the flow channel to extend along a curve.
    Type: Grant
    Filed: December 30, 2022
    Date of Patent: October 3, 2023
    Inventors: Rui Chen, Yuqing Chang, Shichuan Tang
  • AEROSOL PARTICULATE MATTER COLLECTING DEVICE AND COLLECTING METHOD
    Publication number: 20230294024
    Abstract: The aerosol particulate matter collecting device includes a shell, a first electric field component, a second electric field component and the collection unit. The first electric field component is connected to the shell and forms a first electric field area, the second electric field component is connected to the shell and forms a second electric field area, the second electric field component includes a first plate and a second plate, and the electric property of the first plate is opposite to that of the first electric charges; a bottom plate of the collection unit is located between the first plate and the second plate, protrusions are arranged on the bottom plate, a flow channel for accommodating collecting liquid is formed in the bottom plate, the protrusions are configured to enable the flow channel to extend along a curve.
    Type: Application
    Filed: December 30, 2022
    Publication date: September 21, 2023
    Applicant: Institute of Urban Safety and Environmental Science, Beijing Academy of Science and Technology
    Inventors: Rui Chen, Yuqing Chang, Shichuan Tang
  • Methods for analyzing ultra-trace amounts of metals in liquids
    Patent number: 10794820
    Abstract: The present invention relates to a method of detecting one or more metals in as liquid sample. The method includes the step of extracting the metal from the liquid sample and retaining the metal on a binding material. The detection of the extracted metal can be performed with the metal retained on the binding material or after the elution of the metal off the binding material.
    Type: Grant
    Filed: April 10, 2017
    Date of Patent: October 6, 2020
    Inventors: Ying Wang, Yuqing Chang
  • METHODS FOR ANALYZING ULTRA-TRACE AMOUNTS OF METALS IN LIQUIDS
    Publication number: 20190212257
    Abstract: The present invention relates to a method of detecting one or more metals in as liquid sample. The method includes the step of extracting the metal from the liquid sample and retaining the metal on a binding material. The detection of the extracted metal can be performed with the metal retained on the binding material or alter the elution of the metal off the binding material.
    Type: Application
    Filed: April 10, 2017
    Publication date: July 11, 2019
    Inventors: Ying Wang, Yuqing Chang