Patents by Inventor Enmin Li

Enmin Li 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).

  • Publication number: 20240299715
    Abstract: The disclosure belongs to the technical field of capsule robotics, and in particular, relates to a magnetically driven capsule robot with controllable drug administration and sampling functions and a fabrication method thereof. A magnetically driven capsule robot provided by the disclosure includes a robot body and a magnetic field-driven control module. The robot body includes a capsule shell, two ends of the capsule shell are provided with hollow air chambers, and a carrier chamber is disposed between the hollow air chambers disposed on the two ends. A substance transfer channel, a magnetic lock disposed around the substance transfer channel, and a magnetic soft switch valve matched with the magnetic lock are disposed on a side wall of the carrier chamber. The soft valve automatically closes due to the magnetic attraction force between the lock and valve, and can be flexibly opened under a magnetic torque acting on the valve.
    Type: Application
    Filed: March 3, 2024
    Publication date: September 12, 2024
    Applicant: HUAZHONG UNIVERSITY OF SCIENCE AND TECHNOLOGY
    Inventors: Quanliang Cao, Yuxuan Sun, Liang Li, Wang Zhang, Enmin Song
  • Patent number: 10131689
    Abstract: Provided is a separation and purification method for vancomycin hydrochloride of high purity. The method comprises the following steps: (1) obtaining a vancomycin hydrochloride solution from a crude vancomycin product by ion exchange chromatography and obtaining a concentrate by nanofiltration desalination and concentration; (2) adjusting the concentrate with a hydrochloric acid solution and then performing a column chromatography using a reverse chromatography column for the adjusted concentrate; (3) collecting the chromatographic solution of vancomycin to obtain a mixed chromatographic solution; (4) adjusting the mixed chromatographic solution, and separating the solution and the salts by nanofiltration desalination and concentration to obtain a concentrate; and (5) obtaining a vancomycin dry powder with a chromatographic purity of up to 99% and a pure white appearance by dehydrating and drying the concentrate of step (4), or by solvent crystallization or salting-out crystallization.
    Type: Grant
    Filed: October 27, 2014
    Date of Patent: November 20, 2018
    Assignee: Zhejiang Medicine Co., Ltd. Xinchang Pharmaceutical Factory
    Inventors: Enmin Li, Yiyun Zhuang, Jue Wang, Xinqiang Sun, Xuejun Lao, Biwang Jiang
  • Publication number: 20160264620
    Abstract: Provided is a separation and purification method for vancomycin hydrochloride of high purity. The method comprises the following steps: (1) obtaining a vancomycin hydrochloride solution from a crude vancomycin product by ion exchange chromatography and obtaining a concentrate by nanofiltration desalination and concentration; (2) adjusting the concentrate with a hydrochloric acid solution and then performing a column chromatography using a reverse chromatography column for the adjusted concentrate; (3) collecting the chromatographic solution of vancomycin to obtain a mixed chromatographic solution; (4) adjusting the mixed chromatographic solution, and separating the solution and the salts by nanofiltration desalination and concentration to obtain a concentrate; and (5) obtaining a vancomycin dry powder with a chromatographic purity of up to 99% and a pure white appearance by dehydrating and drying the concentrate of step (4), or by solvent crystallization or salting-out crystallization.
    Type: Application
    Filed: October 27, 2014
    Publication date: September 15, 2016
    Inventors: Enmin Li, Yiyun Zhuang, Jue Wang, Xinqiang Sun, Xuejun Lao, Biwang Jiang
  • Patent number: D861670
    Type: Grant
    Filed: July 30, 2018
    Date of Patent: October 1, 2019
    Assignee: Chunzhixiao (Shenzhen) Science & Technology Co., Ltd.
    Inventor: Enmin Li