Patents by Inventor Kaiqiang Shi

Kaiqiang Shi 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).

  • HYDROGEN PEROXIDE PRODUCTION DEVICE AND USE THEREOF
    Publication number: 20230312376
    Abstract: A gas diffusion electrode includes a carbon fiber tube, a support layer, and a catalyst layer. The carbon fiber tube is straight and functions as a substrate. The support layer includes a carbon black-polytetrafluoroethylene (PTFE) coating, and is disposed on the substrate. The catalyst layer includes carbon black, anhydrous ethanol, and PTFE, and is disposed on the support layer. The gas diffusion electrode has a diameter of 3-20 mm and a length of 50-500 mm.
    Type: Application
    Filed: June 9, 2022
    Publication date: October 5, 2023
    Inventors: Weiqing HAN, Kajia WEI, Kaiqiang SHI, Xiaodong LIU, Xiuyun SUN, Jiansheng LI, Jinyou SHEN
  • Method for preparing elagolix intermediate and composition thereof
    Patent number: 11365178
    Abstract: The present invention relates to a method for preparing an intermediate (Formula IV) of sodium elagolix. The intermediate is prepared by the following route. The method has advantages of simple and safe operation, high yield, less environmental pollution, good economic effect and suitability for industrial production, wherein R represents C1-C4 substituted or unsubstituted benzyl or allyl.
    Type: Grant
    Filed: December 25, 2018
    Date of Patent: June 21, 2022
    Assignees: ZHEJIANG HUAHAI PHARMACEUTICAL CO., LTD., SHANGHAI SYNCORES TECHNOLOGIES, INC
    Inventors: Hu Su, Xiaowen Guo, Yukun Liang, Kaiqiang Shi, Jintao Yang, Kang He, Anping Tao, Luning Huang, Jianguo An, Xi Chen, Hong Gu
  • METHOD FOR PREPARING BRIVARACETAM AND INTERMEDIATE THEREOF
    Publication number: 20220048856
    Abstract: The present application relates to a method (I) for preparing a brivaracetam intermediate, comprising the steps of dissolving the compound represented by B-P and 1S,2S-diphenylethylenediamine in a solvent for resolution, crystallizing, filtering, and recrystallizing to obtain the compound represented by B-Q, which is then converted to the brivaracetam intermediate represented by B-R. This method can effectively resolve the compound represented by B-P. The present application also provides a method for preparing brivaracetam using the compound represented by B-R. The method can separate the effective components only through simple steps such as extraction, washing, drying, and concentration without requiring use of chiral chromatography column to separate isomers in the preparation process, and thus the separation process is simple, greatly reducing the production cost of brivaracetam.
    Type: Application
    Filed: December 12, 2019
    Publication date: February 17, 2022
    Inventors: Haisheng FAN, Yipeng ZHAN, Kai YIN, Xiang JI, Fenghao LIU, Kaiqiang SHI, Xiaowen GUO, Luning HUANG, Anping TAO, Jianguo AN, Hong GU
  • METHOD FOR PREPARING ELAGOLIX INTERMEDIATE AND COMPOSITION THEREOF
    Publication number: 20200369625
    Abstract: The present invention relates to a method for preparing an intermediate (Formula IV) of sodium elagolix. The intermediate is prepared by the following route. The method has advantages of simple and safe operation, high yield, less environmental pollution, good economic effect and suitability for industrial production, wherein R represents C1-C4 substituted or unsubstituted benzyl or allyl.
    Type: Application
    Filed: December 25, 2018
    Publication date: November 26, 2020
    Inventors: Hu Su, Xiaowen Guo, Yukun Liang, Kaiqiang Shi, Jintao Yang, Kang He, Anping Tao, Luning Huang, Jianguo An, Xi Chen, Hong Gu