Patents by Inventor Jay H. Chang

Jay H. Chang 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).

  • Quinoline carboxylic acid derivatives having 7-(4-amino-methyl-3-oxime) pyrrolidine substituent and processes for preparing thereof
    Patent number: 5633262
    Abstract: The present invention relates to a novel quinolone compound having an excellent antibacterial activity. More specifically, the present invention relates to a novel quinoline(naphthyridine)carboxylic acid derivative represented by the following formula (I), which has an 4-aminomethyl-3-oximepyrrolidine substituent on 7-position of the quinolone nucleus and shows a superior antibacterial activity in contrast to the known quinolone antibacterial agents having a weak activity against gram-positive bacterial strains and also has a broad antibacterial spectrum and a highly improved pharmacokinetic property: ##STR1## wherein R, R.sub.1, R.sub.2, R.sub.3, R.sub.4 and Q are defined as described in the specification.
    Type: Grant
    Filed: June 15, 1995
    Date of Patent: May 27, 1997
    Assignee: LG Chemical Ltd.
    Inventors: Chang Y. Hong, Young K. Kim, Jay H. Chang, Se H. Kim, Hoon Choi, Do H. Nam, Jin H. Kwak, Yi N. Jeong, Jeong I. Oh, Mu Y. Kim