Patents by Inventor Yukun Chang

Yukun Chang 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).

  • THIOPHENE DERIVATIVES PREPARING
    Publication number: 20250074918
    Abstract: Disclosed is a process for preparing a compound of formula (VII), comprising subjecting a compound of formula (VI) to a condensation reaction
    Type: Application
    Filed: December 20, 2022
    Publication date: March 6, 2025
    Applicant: GANZHOU HEMAY PHARMACEUTICAL, CO., LTD
    Inventors: Guanghuai ZENG, Yukun CHANG
  • 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: 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
  • 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: 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