Patents by Inventor Jeong S. Chae

Jeong S. 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).

  • Cephalosporin derivatives
    Patent number: 5593984
    Abstract: The present invention relates to novel cephalosporin derivatives or pharmaceutically acceptable non-toxic salts thereof useful as antibiotics and to processes for the preparation thereof. ##STR1## wherein: R.sup.1 is a hydrogen or an optionally halogen-substituted C.sub.1-3 alkyl group, a propargyl group or --C(R.sup.a)(R.sup.b)COOH, wherein R.sup.1 and R.sup.b are independently a hydrogen or a C.sub.1-3 alkyl group;R.sup.2, R.sup.3, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 are independently a hydrogen or halogen or a C.sub.1-3 alkyl, amino or hydroxy C.sub.1-3 alkylthio, cyano, carbamoyl, carboxyl, hydroxy C.sub.1-3 alkyl, nitro, acetyl or formyl group; andQ is CH, N or CCl.
    Type: Grant
    Filed: March 31, 1995
    Date of Patent: January 14, 1997
    Assignee: Yuhan Corporation
    Inventors: Jong W. Lee, Jeong S. Chae, Young R. Choi, Yeong N. Lee, Eun R. Rho, Heui I. Kang, Jae W. Hyun
  • 1,3-dithiol-2-ylidene derivatives and process for the preparation thereof
    Patent number: 5158950
    Abstract: 2-(1,3-Dithiol-2-ylidene)-2-[N-(substituted) carbamoly] acetate esters and salts thereof, having potent therapeutic or prophylactic effect for hepatic disorder, are provided. Processes for their preparation and intermediates in their preparation also are disclosed.
    Type: Grant
    Filed: May 23, 1990
    Date of Patent: October 27, 1992
    Assignee: Yuhan Corporation, Ltd.
    Inventors: Choong S. Kim, Jeong S. Chae, Young R. Choi, Jong W. Lee, Joung K. Yoo
  • Dithioketene derivatives, pharmaceutical compositions containing the same and uses thereof
    Patent number: 5103013
    Abstract: 2-(1,3-Dithietan-2-ylidene)-2-[N-(subsittuted)carbamoyl]acetate esters and 2-(1,3-dithiolan-2-ylidene)-2-[N-(substituted) carbamoyl]acetate esters, having potent therapeutic and prophylactic effect for hepatic disorders, are provided.
    Type: Grant
    Filed: October 23, 1989
    Date of Patent: April 7, 1992
    Assignee: Yuhan Corporation, Ltd.
    Inventors: Choong S. Kim, Jeong S. Chae, Ho Seong Yoo, Jong W. Lee, Jae G. Park, Jeong W. Lee