Patents by Inventor Zehua ZHONG

Zehua ZHONG 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).

  • Patent number: 12235297
    Abstract: A current sampling system, the system including a magnetic component, that is an inductor or a transformer that has at least one winding, where the at least one winding has a first part and a second part, where a first terminal of the first part is connected to a first terminal of the second part, and where a second terminal of the first part is separated from a second terminal of the second part, and a current detection circuit, where the second terminal of the second part is connected to the current detection circuit, and where the current detection circuit is configured to sample a current flowing through the second part, and obtain a total current of the winding based on the sampled current flowing through the second part and a preset ratio.
    Type: Grant
    Filed: December 30, 2022
    Date of Patent: February 25, 2025
    Assignee: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.
    Inventors: Zezhou Yang, Liqiong Yi, Zehua Liang, Shu Zhong, Tao Xie
  • Patent number: 10364219
    Abstract: Disclosed is a new method for preparing an azetidinone compound represented by formula (I). The carboxylic ketoester represented by formula (II) serves as the raw material and is subjected to Grignard addition, stereoselective dehydration, ester group reduction, hydroxyl group protection, addition with imine after condensation with a chiral auxiliary, cyclization and deprotection to obtain the compound represented by formula (I). The present invention has advantages of easily available raw material, a few synthetic steps, simple operation, high yield, good stereoselectivity and low cost, and can be used for industrial production.
    Type: Grant
    Filed: December 8, 2017
    Date of Patent: July 30, 2019
    Assignee: Zhejiang Hisun Pharmaceutical Co., Ltd.
    Inventors: Hua Bai, Xuyang Zhao, Yuncai Zhang, Xufei Li, Yong Zhang, Dezhou Xu, Li Zhang, Xiaojie Xu, Qifeng Zhu, Xiaoming Wang, Zhiqing Yang, Zehua Zhong, Jian Zhang
  • Publication number: 20180099930
    Abstract: Disclosed is a new method for preparing an azetidinone compound represented by formula (I). The carboxylic ketoester represented by formula (II) serves as the raw material and is subjected to Grignard addition, stereoselective dehydration, ester group reduction, hydroxyl group protection, addition with imine after condensation with a chiral auxiliary, cyclization and deprotection to obtain the compound represented by formula (I). The present invention has advantages of easily available raw material, a few synthetic steps, simple operation, high yield, good stereoselectivity and low cost, and can be used for industrial production.
    Type: Application
    Filed: December 8, 2017
    Publication date: April 12, 2018
    Applicant: Zhejiang Hisun Pharmaceutical Co., Ltd.
    Inventors: Hua Bai, Xuyang Zhao, Yuncai Zhang, Xufei Li, Yong Zhang, Dezhou Xu, Li Zhang, Xiaojie Xu, Qifeng Zhu, Xiaoming Wang, Zhiqing Yang, Zehua Zhong, Jian Zhang
  • Patent number: 9926268
    Abstract: Disclosed is a new method for preparing an azetidinone compound represented by formula (I). The carboxylic ketoester represented by formula (II) serves as the raw material and is subjected to Grignard addition, stereoselective dehydration, ester group reduction, hydroxyl group protection, addition with imine after condensation with a chiral auxiliary, cyclization and deprotection to obtain the compound represented by formula (I). The present invention has advantages of easily available raw material, a few synthetic steps, simple operation, high yield, good stereoselectivity and low cost, and can be used for industrial production.
    Type: Grant
    Filed: June 5, 2015
    Date of Patent: March 27, 2018
    Assignee: Zhejiang Hisun Pharmaceutical Co., Ltd.
    Inventors: Hua Bai, Xuyang Zhao, Yuncai Zhang, Xufei Li, Yong Zhang, Dezhou Xu, Li Zhang, Xiaojie Xu, Qifeng Zhu, Xiaoming Wang, Zhiqing Yang, Zehua Zhong, Jian Zhang
  • Publication number: 20170121281
    Abstract: Disclosed is a new method for preparing an azetidinone compound represented by formula (I). The carboxylic ketoester represented by formula (II) serves as the raw material and is subjected to Grignard addition, stereoselective dehydration, ester group reduction, hydroxyl group protection, addition with imine after condensation with a chiral auxiliary, cyclization and deprotection to obtain the compound represented by formula (I). The present invention has advantages of easily available raw material, a few synthetic steps, simple operation, high yield, good stereoselectivity and low cost, and can be used for industrial production.
    Type: Application
    Filed: June 5, 2015
    Publication date: May 4, 2017
    Applicant: Zhejiang Hisun Pharmaceutical Co., Ltd.
    Inventors: Hua BAI, Xuyang ZHAO, Yuncai ZHANG, Xufei LI, Yong ZHANG, Dezhou XU, Li ZHANG, Xiaojie XU, Qifeng ZHU, Xiaoming WANG, Zhiqing YANG, Zehua ZHONG, Jian ZHANG