Patents by Inventor Qinghai Liu

Qinghai Liu 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).

  • D-AMINO ACID OXIDASE MUTANTS AND USES THEREOF IN PREPARING L-GLUFOSINATE
    Publication number: 20240101974
    Abstract: Embodiments of the present disclosure relate to a D-amino acid oxidase mutant and application in preparing L-glufosinate thereof. The D-amino acid oxidase mutant has an amino acid substitution at at least one of position 62 and position 226 of an amino acid sequence of the D-amino acid oxidase mutant when compared to an amino acid sequence of a D-amino acid oxidase as set forth in SEQ ID NO. 1, the position 62 and position 226 being defined with reference to SEQ ID NO. 1, and the amino acid sequence of the D-amino acid oxidase mutant having at least 90% identity to SEQ ID NO. 1.
    Type: Application
    Filed: September 18, 2023
    Publication date: March 28, 2024
    Applicants: YONGNONG BIOSCIENCES CO., LTD., EAST CHINA UNIVERSITY OF SCIENCE AND TECHNOLOGY, NINGXIA YONGNONG BIOSCIENCES CO., LTD.
    Inventors: Dongzhi WEI, Hualei WANG, Chengjun WU, Qinghai LIU, Jian ZHANG, Zhonghua LUO, Changlei ZHANG
  • DUAL BAND TRANSMITTER
    Publication number: 20170054212
    Abstract: A dual band transmitter for transmitting a data signal in a first frequency or second frequency band. An antenna receives and sends data in one of the first and second frequency bands. An impedance matching network is connected in series with the antenna, and to a first node, and matches the impedance of the antenna to a predetermined value. The impedance matching network includes first and second antenna matching networks. The first antenna matching network is connected in series with the second matching network. In the first frequency band, the first antenna matching network matches the impedance of the antenna to the predetermined value, and in the second frequency band the second antenna matching network matches the impedance of the antenna to the predetermined value without affecting the first antenna matching network's matching in the first frequency band.
    Type: Application
    Filed: July 25, 2016
    Publication date: February 23, 2017
    Inventor: QINGHAI LIU
  • Dual band transmitter
    Patent number: 9570806
    Abstract: A dual band transmitter for transmitting a data signal in a first frequency or second frequency band. An antenna receives and sends data in one of the first and second frequency bands. An impedance matching network is connected in series with the antenna, and to a first node, and matches the impedance of the antenna to a predetermined value. The impedance matching network includes first and second antenna matching networks. The first antenna matching network is connected in series with the second matching network. In the first frequency band, the first antenna matching network matches the impedance of the antenna to the predetermined value, and in the second frequency band the second antenna matching network matches the impedance of the antenna to the predetermined value without affecting the first antenna matching network's matching in the first frequency band.
    Type: Grant
    Filed: July 25, 2016
    Date of Patent: February 14, 2017
    Assignee: NXP B.V.
    Inventor: Qinghai Liu