Patents by Inventor Hong-Chul Yun

Hong-Chul Yun 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).

  • Reduction of carbonyl compounds using the carbonyl reductase of
    Patent number: 7094908
    Abstract: A compound represented by a general formula (Ia) or (Ib) and a stereo-selective preparation method thereof using a carbonyl reductase which is separated from Kluyveromyces marxianus. The compound can be prepared by reduction of substituted ?-keto ester and can be used as an intermediate in preparing ?-lactam group antibiotics.
    Type: Grant
    Filed: December 23, 2002
    Date of Patent: August 22, 2006
    Assignee: Korea Institute of Science and Technology
    Inventors: Hun Yeong Koh, Kyung Il Choi, Yong Seo Cho, Ae Nim Pae, Joo Hwan Cha, Ye Sun Han, Jong Soo Lee, Hong Chul Yun
  • Carbonyl reductase of and its isolation and purification method
    Patent number: 7091016
    Abstract: Carbonyl reductase (CR) of a yeast strain, Kluyveromyces marxianus, and its isolation and purification method thereof is provided. The reduction reaction by the reductase obtained in the present invention is more stereospecific and requires less cost and time than the reduction reactions by the microorganisms or by the reducing enzymes obtained from a chemical synthesis.
    Type: Grant
    Filed: January 17, 2003
    Date of Patent: August 15, 2006
    Assignee: Korea Institute of Science and Technology
    Inventors: Hun-Yeong Koh, Ye-Sun Han, Joo-Hwan Cha, Wook-Hyun Kim, Jong-Soo Lee, Hong-Chul Yun
  • Carbonyl reductase of kluyveromyces marxianus and its isolation and purification method
    Publication number: 20030170844
    Abstract: Carbonyl reductase (CR) of a yeast strain, Kluyveromyces marxianus, and its isolation and purification method thereof is provided. The reduction reaction by the reductase obtained in the present invention is more stereospecific and requires less cost and time than the reduction reactions by the microorganisms or by the reducing enzymes obtained from a chemical synthesis.
    Type: Application
    Filed: January 17, 2003
    Publication date: September 11, 2003
    Applicant: Korea Institute of Science and Technology
    Inventors: Hun-Yeong Koh, Ye-Sun Han, Joo-Hwan Cha, Wook-Hyun Kim, Jong-Soo Lee, Hong-Chul Yun
  • Reduction of carbonyl compounds using the carbonyl reductase of kluyveromyces marxianus
    Publication number: 20030139464
    Abstract: A compound represented by a genera formula (Ia) or (Ib) and a stereo-selective preparation method thereof using a carbonyl reductase which is separated from Kluyveromyces marxianus. The compound can be prepared by reduction of substituted &bgr;-keto ester and can be used as an intermediate in preparing &bgr;-lactam group antibiotics.
    Type: Application
    Filed: December 23, 2002
    Publication date: July 24, 2003
    Applicant: Korea Institute of Science and Technology
    Inventors: Hun Yeong Koh, Kyuno Choi, Yong Seo Cho, Ae Nim Pae, Joo Hwan Cha, Ye Sun Han, Jong Soo Lee, Hong Chul Yun