Patents by Inventor Xiaoqian Xu

Xiaoqian Xu 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).

  • Publication number: 20240161535
    Abstract: Sensing circuit, detection control method, fingerprint identification module and display apparatus are provided. The sensing circuit comprises a photoelectric conversion element, an energy storage circuit, a switch control circuit, a discharge control circuit and a voltage conversion circuit. The photoelectric conversion element controls potential of first terminal of energy storage circuit according to received optical signal; the switch control circuit controls first terminal of energy storage circuit to be connected to or disconnected from conversion control node; the discharge control circuit controls conversion control node be connected to or disconnected from first voltage terminal; the voltage conversion circuit controls to output voltage signal outputted by output terminal according to second and/or third voltage signals.
    Type: Application
    Filed: June 18, 2021
    Publication date: May 16, 2024
    Inventors: Chao CHEN, Shuai XU, Wenchen ZHANG, Bin ZHAO, Xiaoqian DU, Luyao FAN, Binbin XU, Zhenqian ZHAO, Junyu WU, Jingshu ZHANG
  • Publication number: 20230241583
    Abstract: Providing a surface molecularly imprinted magnetic nanomaterial of salvianolic acid A, a preparation method therefor and use thereof. The nanomaterial is obtained by using ferroferric oxide nanoparticles as a core, salvianolic acid A as a template molecule, 4-acryloyloxy phenylboronic acid, vinyl imidazole and methacryloylpropyl trimethyl ammonium chloride as copolymerization functional monomers, bismethylene acrylamide as a cross-linking agent, and azoamidine initiator V50 as an initiator, synthesizing surface imprinted magnetic material containing template molecules by surface polymerization, and finally eluting the template molecule with 0.1 M HCl. It is a spherical particle with a core-shell structure of about 250 nm, with positive charge on the surface and strong hydrophilicity, which can be recycled. Moreover, this magnetic material is easy to be separated by a magnet.
    Type: Application
    Filed: March 30, 2023
    Publication date: August 3, 2023
    Inventors: Guoyin KAI, Jun QIAN, Xiaoqian XU
  • Patent number: 8823935
    Abstract: A system to detect and classify defects on a surface of a substrate. A first targeting assembly directs radiation in a first beam onto the substrate. A first collecting assembly collects first radiation specularly reflected from the substrate and produces first signals, a second collecting assembly collects first radiation scattered from the surface of the substrate by defects and not micro-roughness and produces second signals, and a third collecting assembly collects first radiation scattered from the surface of the substrate by defects and micro-roughness and produces third signals. A second targeting assembly directs radiation in a second beam onto the substrate. A fourth collecting assembly collects second radiation scattered from the substrate and produces fourth signals. A processor receives the first, second, third, and fourth signals.
    Type: Grant
    Filed: September 10, 2009
    Date of Patent: September 2, 2014
    Assignee: KLA-Tencor Corporation
    Inventors: Steven W. Meeks, Xiaoqian Xu, Hung P. Nguyen, Alireza Shahdoost Moghadam, Mahendra Prabhu Ramachandran
  • Patent number: 8802669
    Abstract: Disclosed are dihydropyrimidine compounds and preparation methods, pharmaceutical compositions and uses thereof. Specifically, the compounds described herein in general formula (I), or their isomers, pharmaceutically acceptable salts or hydrates are provided, wherein each variable has the meaning as defined in the description. Also provided are a process for preparing the compounds of the general formula (I), the use of the compounds, an isomer thereof, a pharmaceutically acceptable salt thereof or a hydrate thereof as a medicament, in particular as a medicament for the treatment and/or prevention of Hepatitis B.
    Type: Grant
    Filed: May 27, 2010
    Date of Patent: August 12, 2014
    Assignee: Institute of Pharmacology and Toxicology Academy of Military Medical Sciences, P.L.A. China
    Inventors: Song Li, Xiaoqian Xu, Guoming Zhao, Lili Wang, Hua Guan, Junhai Xiao, Wu Zhong, Zhibing Zheng, Yunde Xie, Xingzhou Li, Xiaokui Wang, Xinbo Zhou, Hongying Liu
  • Publication number: 20120149695
    Abstract: Disclosed are dihydropyrimidine compounds and preparation methods, pharmaceutical compositions and uses thereof. Specifically, the compounds described herein in general formula (I), or their isomers, pharmaceutically acceptable salts or hydrates are provided, wherein each variable has the meaning as defined in the description. Also provided are a process for preparing the compounds of the general formula (I), the use of the compounds, an isomer thereof, a pharmaceutically acceptable salt thereof or a hydrate thereof as a medicament, in particular as a medicament for the treatment and/or prevention of Hepatitis B.
    Type: Application
    Filed: May 27, 2010
    Publication date: June 14, 2012
    Applicant: INSTITUTE OF PHARMACOLOGY AND TOXICOLOGY ACADEMY OF MILITARY MEDICAL SCIENCES P.L.A.
    Inventors: Song Li, Xiaoqian Xu, Guoming Zhao, Lili Wang, Hua Guan, Junhai Xiao, Wu Zhong, Zhibing Zheng, Yunde Xie, Xingzhou Li, Xiaokui Wang, Xinbo Zhou, Hongying Liu