Patents by Inventor Donglei Zhang

Donglei Zhang 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 of thiophene derivatives
    Patent number: 12227514
    Abstract: Disclosed is crystal form I of compound (S)—N-[5-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-4,6-dioxo-5,6-dihydro-4H-thieno[3,4-c]pyrrole-1-yl]acetamide.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: February 18, 2025
    Assignee: TIANJIN HEMAY PHARMACEUTICAL CO., LTD.
    Inventors: Donglei Zhang, Liyu Wang, Yukun Chang
  • Crystal forms of thiophene derivatives
    Patent number: 12180222
    Abstract: Disclosed are polymorph, crystal form III and crystal form IV of compound (S)—N-[5-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-4,6-dioxo-5,6-dihydro-4H-thieno[3,4-c]pyrrole-1-yl]acetamide.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: December 31, 2024
    Assignee: Tianjin Hemay Pharmaceutical Co., Ltd
    Inventors: Donglei Zhang, Liyu Wang, Xingwen Li
  • FLEXIBLE SPINE MODEL AND CORRECTION DEMONSTRATION AND TEST SYSTEM IMPLEMENTED BASED ON SAME
    Publication number: 20240242630
    Abstract: The present application belongs to the technical field of medical model equipment, and specifically relates to a flexible spine model and a demonstration and test system implemented based on the same. The spine model includes hard structures and a soft elastic connecting material, and the hard structures simulate a layout of spine curvatures and are connected into a whole through the soft connecting material. 1) The present application provides a spine model closer to mechanical characteristics of a human spine and can provide a device for practicing and teaching spine correction treatment for learners. 2) The present application provides a scoliosis correction demonstration model, which can provide a whole visual process of scoliosis correction demonstration for the learners to help improve the learning effect. 3) The present application provides a spine internal fixation system test model which can be used for evaluating properties of different spine internal fixation systems.
    Type: Application
    Filed: May 13, 2021
    Publication date: July 18, 2024
    Inventors: Kai LI, Donglei ZHANG
  • Solid forms of thiophene derivatives
    Patent number: 11396518
    Abstract: Disclosed is an amorphous solid form of compound (S)—N-[5-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-4,6-dioxo-5,6-dihydro-4H-thieno[3,4-c]pyrrole-1-yl]acetamide.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: July 26, 2022
    Assignee: TIANJIN HEMAY PHARMACEUTICAL CO., LTD.
    Inventors: Donglei Zhang, Liyu Wang, Xingwen Li
  • Crystal forms of thiophene derivatives
    Patent number: 11274104
    Abstract: Disclosed is crystal form II of compound (S)—N-[5-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-4,6-dioxo-5,6-dihydro-4H-thieno[3,4-c]pyrrole-1-yl]acetamide.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: March 15, 2022
    Assignee: Tianjin Hemay Pharmaceutical Co., Ltd
    Inventors: Donglei Zhang, Liyu Wang, Yukun Chang
  • SOLID FORMS OF THIOPHENE DERIVATIVES
    Publication number: 20210380600
    Abstract: Disclosed is an amorphous solid form of compound (S)-N-[5-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-4,6-dioxo-5,6-dihydro-4H-thieno[3,4-c]pyrrole-1-yl]acetamide.
    Type: Application
    Filed: April 30, 2019
    Publication date: December 9, 2021
    Inventors: Donglei Zhang, Liyu Wang, Xingwen Li
  • CRYSTAL FORMS OF THIOPHENE DERIVATIVES
    Publication number: 20210238191
    Abstract: Disclosed is crystal form II of compound (S)—N-[5-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-4,6-dioxo-5,6-dihydro-4H-thieno[3,4-c]pyrrole-1-yl]acetamide.
    Type: Application
    Filed: April 30, 2019
    Publication date: August 5, 2021
    Inventors: Donglei ZHANG, Liyu WANG, Yukun CHANG
  • CRYSTAL FORMS OF THIOPHENE DERIVATIVES
    Publication number: 20210230181
    Abstract: Disclosed are polymorph, crystal form III and crystal form IV of compound (S)-N-[5-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-4,6-dioxo-5,6-dihydro-4H-thieno[3,4-c]pyrrole-1-yl]acetamide.
    Type: Application
    Filed: April 30, 2019
    Publication date: July 29, 2021
    Inventors: Donglei ZHANG, Liyu WANG, Xingwen LI
  • CRYSTAL FORMS OF THIOPHENE DERIVATIVES
    Publication number: 20210139498
    Abstract: Disclosed is crystal form I of compound (S)—N-[5-[1-(3-ethoxy-4-methoxyphenyl)-2-(methylsulfonyl)ethyl]-4,6-dioxo-5,6-dihydro-4H-thieno[3,4-c]pyrrole-1-yl]acetamide.
    Type: Application
    Filed: April 30, 2019
    Publication date: May 13, 2021
    Inventors: Donglei Zhang, Liyu Wang, Yukun Chang