Patents by Inventor Longhui GAO

Longhui GAO 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).

  • Crystal forms C and E of pyrazin-2(1H)-one compound and preparation method therefor
    Patent number: 11680061
    Abstract: A crystal form of a pyrazin-2(1H)-one compound and a preparation method therefor. The present invention specifically related to a compound of formula (II) and a preparation method for a crystal form of the compound.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: June 20, 2023
    Assignee: ZHANGZHOU PIEN TZE HUANG PHARMACEUTICAL CO., LTD.
    Inventors: Fei Hong, Jinming Huang, Longhui Gao, Shicong Wang, Tingting Yin, Zhifei Fu, Miaorong Luo, Yang Zhang, Jian Li, Shuhui Chen
  • Crystal form D of pyrazine-2(1H)-ketone compound and preparation method therefor
    Patent number: 11597722
    Abstract: The present invention disclosed a crystal form of pyrazine-2(1H)-ketone compound and a preparation method therefor. Specifically disclosed is a method for preparing a compound of formula (II) and a crystal form thereof.
    Type: Grant
    Filed: August 4, 2020
    Date of Patent: March 7, 2023
    Assignee: ZHANGZHOU PIEN TZE HUANG PHARMACEUTICAL CO., LTD.
    Inventors: Zhiliang Chen, Zhiyi Luo, Yichao Zhuang, Jinxia Lin, Longhui Gao, Zhifei Fu, Miaorong Luo, Yang Zhang, Jian Li, Shuhui Chen
  • CRYSTAL FORMS C AND E OF PYRAZIN-2(1H)-ONE COMPOUND AND PREPARATION METHOD THEREFOR
    Publication number: 20220289722
    Abstract: A crystal form of a pyrazin-2(1H)-one compound and a preparation method therefor. The present invention specifically related to a compound of formula (II) and a preparation method for a crystal form of the compound.
    Type: Application
    Filed: August 4, 2020
    Publication date: September 15, 2022
    Inventors: Fei HONG, Jinming HUANG, Longhui GAO, Shicong WANG, Tingting YIN, Zhifei FU, Miaorong LUO, Yang ZHANG, Jian LI, Shuhui CHEN
  • CRYSTAL FORM D OF PYRAZINE-2(1H)-KETONE COMPOUND AND PREPARATION METHOD THEREFOR
    Publication number: 20220281853
    Abstract: Disclosed are a crystal form of pyrazine-2(1H)-ketone compound and a preparation method therefor. Specifically disclosed is a method for preparing a compound of formula (II) and a crystal form thereof.
    Type: Application
    Filed: August 4, 2020
    Publication date: September 8, 2022
    Inventors: Zhiliang CHEN, Zhiyi LUO, Yichao ZHUANG, Jinxia LIN, Longhui GAO, Zhifei FU, Miaorong LUO, Yang ZHANG, Jian LI, Shuhui CHEN