Patents by Inventor Yung B. Chae

Yung B. Chae 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).

  • Process for the production of hydroxymethylimidazoles
    Patent number: 4292431
    Abstract: This invention discloses a process for the production of hydroxymethylimidazoles which comprises reacting imidazolecarboxylic acids, their esters or inorganic salts with a formaldehyde agent in the presence of an alkali in an aqueous medium.
    Type: Grant
    Filed: June 5, 1980
    Date of Patent: September 29, 1981
    Assignee: Korea Institute of Science and Technology
    Inventors: Choong S. Kim, Kee J. Lee, Hong S. Kim, Yung B. Chae
  • Optical resolution of amino acids into optical antipodes
    Patent number: 4182899
    Abstract: The present application relates to the optical resolution into optical antipodes of compounds of the formula ##STR1## as well as to salts consisting of an optical isomer of a compound of the above formula and an optical isomer of 2-aminobutanol. The optically active compounds of the above formula are employed as starting materials for the production of semisynthetic antibiotics of the cephalosporin or penicillin type.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: January 8, 1980
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Yung B. Chae, Dae W. Kim