Patents by Inventor Hang Je CHOI

Hang Je CHOI 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).

  • Biodegradable polymer microparticle containing steroid drug and preparation method therefor
    Patent number: 11376226
    Abstract: Biodegradable polymer microparticles bearing a steroid drug and a preparation method therefor. In the method, a steroid drug and a biodegradable polyester-based polymer are dissolved in an organic solvent and sprayed into a low-temperature hydrocarbon solution to form frozen microparticles that are then immersed in a low-temperature, aqueous salt solution to deprive the microparticles of the organic solvent, thereby preparing biodegradable polymer microparticles bearing a steroid drug. The steroid drug or steroid sex hormone drug-bearing biodegradable polymer microparticles were found to have excellent biocompatibility, biodegradability, porosity, and mechanical strength and to release the steroid drug or steroid sex hormone drug for a long period of time.
    Type: Grant
    Filed: January 9, 2020
    Date of Patent: July 5, 2022
    Assignee: REGENBIOTECH, INC.
    Inventors: Jeoung Yong Kim, Won Chun Lee, Mi Yeon Kang, Hang Je Choi
  • BIODEGRADABLE POLYMER MICROPARTICLE CONTAINING STEROID DRUG AND PREPARATION METHOD THEREFOR
    Publication number: 20210212956
    Abstract: Biodegradable polymer microparticles bearing a steroid drug and a preparation method therefor. In the method, a steroid drug and a biodegradable polyester-based polymer are dissolved in an organic solvent and sprayed into a low-temperature hydrocarbon solution to form frozen microparticles that are then immersed in a low-temperature, aqueous salt solution to deprive the microparticles of the organic solvent, thereby preparing biodegradable polymer microparticles bearing a steroid drug. The steroid drug or steroid sex hormone drug-bearing biodegradable polymer microparticles were found to have excellent biocompatibility, biodegradability, porosity, and mechanical strength and to release the steroid drug or steroid sex hormone drug for a long period of time.
    Type: Application
    Filed: January 9, 2020
    Publication date: July 15, 2021
    Applicant: REGENBIOTECH, INC.
    Inventors: Jeoung Yong KIM, Won Chun LEE, Mi Yeon KANG, Hang Je CHOI