Patents by Inventor Deok-Joong Youn

Deok-Joong Youn 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).

  • Method of producing teicoplanin
    Patent number: 7192743
    Abstract: Disclosed is a method of producing teicoplanin. The method includes purifying teicoplanin from a culture broth, obtained by culturing microorganisms capable of producing teicoplanin by a porous adsorption resin under selective elution conditions and recovering highly pure teicoplanin using activated carbon and/or ultrafiltration. In this regard, the method can further include ultrafiltration as pre-treatment before the culture broth is adsorbed into the porous adsorption resin so as to increase the purity of teicoplanin.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: March 20, 2007
    Assignee: Dong Kook Pharmaceutical Co., Ltd.
    Inventors: Deok-Joong Youn, Ho-Myeung Ryu, Kang-Hee Lee, Dae-Sung Lim, In-Kyu Lee, Sung-Woo Kim, Hyun-Ki Paeng, Kyung-Hoi Cha
  • Method of producing teicoplanin
    Publication number: 20050245481
    Abstract: Disclosed is a method of producing teicoplanin. The method includes purifying teicoplanin from a culture broth, obtained by culturing microorganisms capable of producing teicoplanin by a porous adsorption resin under selective elution conditions and recovering highly pure teicoplanin using activated carbon and/or ultrafiltration. In this regard, the method can further include ultrafiltration as pre-treatment before the culture broth is adsorbed into the porous adsorption resin so as to increase the purity of teicoplanin.
    Type: Application
    Filed: April 15, 2005
    Publication date: November 3, 2005
    Applicant: DONG KOOK PHARMACEUTICAL CO., LTD.
    Inventors: Deok-Joong Youn, Ho-Myeung Ryu, Kang-Hee Lee, Dae-Sung Lim, In-Kyu Lee, Sung-Woo Kim, Hyun-Ki Paeng, Kyung-Hoi Cha
  • Purification process for hirudin using affinity chromatography
    Patent number: 5698104
    Abstract: Disclosed herein is a process for purifying hirudin from a solution containing hirudin and other substances, characterized in that the process comprises a step of subjecting the solution to a metal ion affinity chromatography wherein copper ion (Cu.sup.++) is used as a metal ion and a phosphate buffer is used as an eluent.
    Type: Grant
    Filed: September 6, 1995
    Date of Patent: December 16, 1997
    Assignees: Dong Kook Pharmaceutical Co., Ltd., Korean Institute of Science and Technology
    Inventors: Sang Ki Rhee, Bong Hyun Chung, Eui Sung Choi, Jung Hoon Sohn, Deok Joong Youn, Myung Kuk Kim, Hae Don Lee