Patents by Inventor Chul H. Lee

Chul H. Lee 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).

  • Legionella specific antibiotic produced by Streptomyces sp AL91 access ion number KCCM 10055
    Patent number: 5529924
    Abstract: A Legionella specific antibiotic AL072 is disclosed. In addition the antibiotic is produced by the microorganism Streptomyces sp. AL91 KCCM 10055.Further, the antibiotic compound has a specified formula.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: June 25, 1996
    Assignees: Cheil Foods & Chemicals, Inc., Korea Institute of Science and Technology
    Inventors: Yong W. Lee, Yeong S. Lee, Chang S. Yon, Jung W. Sush, Chul H. Lee, Yoong H. Lim, Ick D. Yoo
  • A process for producing legionella specific antibiotic using Streptomyces sp. AL91
    Patent number: 5503997
    Abstract: A Legionella specific antibiotic AL072, a Streptomyces sp. AL91 producing the antibiotic, and a process for producing the antibiotic are disclosed. Further, the antibiotic compound has a specified formula. The formula is ##STR1## In addition the process also includes extraction of a culture broth provided by cultivating the microorganism Streptomyces sp. AL91, accession number KCCM 10055, with isopropyl alcohol and ethyl acetate to obtain an extract containing the antibiotic compound. The compound is then isolated from the extract by chromatography on a column filled with octadecyl silica gel and also by high pressure liquid chromatography.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: April 2, 1996
    Assignees: Cheil Foods & Chemicals, Inc., Korea Institute of Science and Technology
    Inventors: Young W. Lee, Yeong S. Lee, Chang S. Yon, Jun W. Suh, Chul H. Lee, Yoong H. Lim, Ick D. Yoo
  • Legionella specific antibiotic
    Patent number: 5486630
    Abstract: A Legionella specific antibiotic AL072 is disclosed. In addition the antibiotic is produced by the microorganism Streptomyces sp. AL91KCCM 10055. Further, the antibiotic compound has a specified formula.
    Type: Grant
    Filed: November 14, 1994
    Date of Patent: January 23, 1996
    Assignees: Cheil Foods & Chemicals Inc., Korea Institute of Science and Technology
    Inventors: Yong W. Lee, Yeong S. Lee, Chang S. Yon, Jung W. Suh, Chul H. Lee, Yoong H. Lim, Ick D. Yoo