Patents by Inventor Yiwen Song

Yiwen Song 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).

  • METHOD FOR PREPARING PYRROLIDONE
    Publication number: 20240132925
    Abstract: The invention provides a method for preparing pyrrolidone, and the invention provides a method for catalytically preparing pyrrolidone with ?-aminobutyric acid in the presence of carnitine-CoA ligase CaiC. The carnitine-CoA ligase CaiC has an amino acid sequence as shown in SEQ ID NO:1. The ligase has catalytic activity in the cyclization of ?-aminobutyric acid to produce pyrrolidone. The carnitine-CoA ligase provided in the present invention affords a yield of pyrrolidone of 3.26 g/L and a molar yield of 39.53% in 24 h when ?-aminobutyric acid is used as a substrate, thus reducing the production period, improving the production of pyrrolidone, and accelerating the industrialization process of producing pyrrolidone by enzymatic conversion method.
    Type: Application
    Filed: October 18, 2022
    Publication date: April 25, 2024
    Inventors: Jing WU, Xuling JIANG, Liming LIU, Wei SONG, Yiwen ZHOU, Xiulai CHEN, LIU Jia, Cong GAO
  • Cooling fan
    Patent number: D979040
    Type: Grant
    Filed: January 21, 2021
    Date of Patent: February 21, 2023
    Inventors: Weikang Yan, Sha Li, Jingjing Wang, Xue Zhang, Yiwen Song, Cong Xiao
  • Light source
    Patent number: D980461
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: March 7, 2023
    Inventor: Yiwen Song
  • Light source
    Patent number: D980462
    Type: Grant
    Filed: January 28, 2022
    Date of Patent: March 7, 2023
    Inventor: Yiwen Song
  • Light source
    Patent number: D981009
    Type: Grant
    Filed: September 23, 2021
    Date of Patent: March 14, 2023
    Inventor: Yiwen Song
  • Electric heater
    Patent number: D992100
    Type: Grant
    Filed: July 14, 2021
    Date of Patent: July 11, 2023
    Inventors: Jingyu Pang, Sha Li, Jingjing Wang, Luan Qin, Ke Mou, Yiwen Song
  • Light source
    Patent number: D1022262
    Type: Grant
    Filed: December 19, 2023
    Date of Patent: April 9, 2024
    Inventor: Yiwen Song