Patents by Inventor Ranqiu Wang

Ranqiu Wang 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).

  • Solid-phase extraction material, and preparation method and use thereof
    Patent number: 12220685
    Abstract: The present invention relates to the field of solid-phase extraction, and particularly to a solid-phase extraction material, and a preparation method and use thereof. The preparation method includes prepolymerizing the monomers N-vinylpyrrolidone and divinylbenzene in the presence of a chain transfer agent, adding prepolymer dropwise to an emulsion of monodispersed seed microspheres, swelling, and reacting to prepare white spheres; and functionalizing the white spheres, to obtain the solid-phase extraction material. The solid-phase extraction material prepared by the reaction has good spherical morphology, large specific surface area, and high ion exchange capacity. The prepared solid-phase extraction material functions in the separation and enrichment of PPCPs by means of a variety of forces with a high extraction rate. The extraction rate is basically maintained between 85% and 105%, and acidic, alkaline, neutral and amphoteric substances is capable of being selectively separated.
    Type: Grant
    Filed: May 6, 2022
    Date of Patent: February 11, 2025
    Assignee: NANJING UNIVERSITY
    Inventors: Qing Zhou, Ziang Zhang, Junxia Chen, Yurong Chen, Chongtian Lei, Ranqiu Wang, Weiwei Zhou, Libin Zhang
  • SOLID-PHASE EXTRACTION MATERIAL, AND PREPARATION METHOD AND USE THEREOF
    Publication number: 20240207815
    Abstract: The present invention relates to the field of solid-phase extraction, and particularly to a solid-phase extraction material, and a preparation method and use thereof. The preparation method includes prepolymerizing the monomers N-vinylpyrrolidone and divinylbenzene in the presence of a chain transfer agent, adding prepolymer dropwise to an emulsion of monodispersed seed microspheres, swelling, and reacting to prepare white spheres; and functionalizing the white spheres, to obtain the solid-phase extraction material. The solid-phase extraction material prepared by the reaction has good spherical morphology, large specific surface area, and high ion exchange capacity. The prepared solid-phase extraction material functions in the separation and enrichment of PPCPs by means of a variety of forces with a high extraction rate. The extraction rate is basically maintained between 85% and 105%, and acidic, alkaline, neutral and amphoteric substances is capable of being selectively separated.
    Type: Application
    Filed: May 6, 2022
    Publication date: June 27, 2024
    Inventors: Qing ZHOU, Ziang ZHANG, Junxia CHEN, Yurong CHEN, Chongtian LEI, Ranqiu WANG, Weiwei ZHOU, Libin ZHANG
  • COORDINATED SILENT PERIOD WITH SOUNDING REFERENCE SIGNAL (SRS) CONFIGURATION
    Publication number: 20110255431
    Abstract: A method of wireless communication includes configuring a virtual SRS (sounding reference signal) transmission to prompt a user equipment (UE) to use a shortened uplink transmission format to create a silent period at an end of a subframe. Reports are received from the UE indicating interference observed during the silent period.
    Type: Application
    Filed: April 11, 2011
    Publication date: October 20, 2011
    Applicant: QUALCOMM INCORPORATED
    Inventors: Ranqiu Wang, Durga Prasad Malladi, Hao Xu, Naga Bhushan, Yongbin Wei