Patents by Inventor Kyoung E. Choi

Kyoung E. Choi 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).

  • 3-fused pyridiniummethyl cephalosporins
    Patent number: 5281589
    Abstract: Novel semi-synthetic cephalosporin derivatives having a fused pyridiniummethyl at 3-position of the cephem nucleus, pharmaceutically acceptable salts, physiologically hydrolizable esters or solvates thereof are disclosed. Also disclosed is a process for preparing the cephalosporin derivatives which comprises introducing a fused pyridiniummethyl substituent at 3-position of 7-.beta.-[(Z)-2-(2-aminothiazol-4-yl)-2-methoxyiminoacetamido]-3-cephem-ca rboxylic acid derivatives. The compounds of the present invention show potent antibacterial activities and a broad spectrum against both gram-positive and gram-negative bacteria.
    Type: Grant
    Filed: June 10, 1992
    Date of Patent: January 25, 1994
    Assignee: Cheil Foods & Chemicals, Inc.
    Inventors: Choong S. Kim, Seung H. An, Sung K. Cho, Yang S. Ahn, Kyoung E. Choi, Je H. Kim, Rok L. Yun, Sung Y. Park, Yeo H. Yoon, Chun S. Lyu, Koun H. Lee