Patents by Inventor Chang-Keun Hyun

Chang-Keun Hyun 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).

  • SUSTAINED RELEASE TABLET COMPRISING PREGABALIN THROUGH TWO-PHASE RELEASE-CONTROLLING SYSTEM
    Publication number: 20180147150
    Abstract: Provided is a sustained release tablet having two-phase release-controlling system, which consists of a first release-controlling phase including pregabalin or its salt and hydroxypropyl methylcellulose; and a second release-controlling phase including polyethylene oxide as a swelling polymer, the first release-controlling phase being homogeneously dispersed in the second release-controlling phase.
    Type: Application
    Filed: January 29, 2018
    Publication date: May 31, 2018
    Applicant: YUHAN CORPORATION
    Inventors: Jeong-Hoon WOO, Woon-Sook NA, Yang-Soo JEONG, Chang-Keun HYUN, Yoong-Sik PARK
  • SUSTAINED RELEASE TABLET COMPRISING PREGABALIN THROUGH TWO-PHASE RELEASE-CONTROLLING SYSTEM
    Publication number: 20140161880
    Abstract: Provided is a sustained release tablet having two-phase release-controlling system, which consists of a first release-controlling phase comprising pregabalin or its salt and hydroxypropyl methylcellulose; and a second release-controlling phase comprising polyethylene oxide as a swelling polymer, the first release-controlling phase being homogeneously dispersed in the second release-controlling phase.
    Type: Application
    Filed: July 20, 2012
    Publication date: June 12, 2014
    Applicant: YUHAN CORPORATION
    Inventors: Jeong-Hoon Woo, Woon-Sook Na, Yang-Soo Jeong, Chang-Keun Hyun, Yoong-Sik Park
  • Revaprazan-containing solid dispersion and process for the preparation thereof
    Patent number: 8663658
    Abstract: The present invention provides a solid dispersion in which revaprazan particles are surface-modified with a water-soluble polymer, a water-soluble saccharide, a surfactant, or a mixture thereof and a process for preparing the same. The present invention also provides a pharmaceutical composition containing the solid dispersion and a process for preparing the pharmaceutical composition.
    Type: Grant
    Filed: December 21, 2007
    Date of Patent: March 4, 2014
    Assignee: Yuhan Corporation
    Inventors: Young-Joon Park, Chang-Keun Hyun
  • REVAPRAZAN-CONTAINING SOLID DISPERSION AND PROCESS FOR THE PREPARATION THEREOF
    Publication number: 20100041688
    Abstract: The present invention provides a solid dispersion in which revaprazan particles are surface-modified with a water-soluble polymer, a water-soluble saccharide, a surfactant, or a mixture thereof and a process for preparing the same. The present invention also provides a pharmaceutical composition containing the solid dispersion and a process for preparing the pharmaceutical composition.
    Type: Application
    Filed: December 21, 2007
    Publication date: February 18, 2010
    Applicant: YUHAN CORPORATION
    Inventors: Young-Joon Park, Chang-Keun Hyun