Patents by Inventor Do Hyun Nam

Do Hyun Nam 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: 5840916
    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 antibactrial 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: April 4, 1997
    Date of Patent: November 24, 1998
    Assignee: LG Chemical Ltd.
    Inventors: Chang Yong Hong, Young Kwan Kim, Jay Hyok Chang, Se Ho Kim, Hoon Choi, Do Hyun Nam, Jin-Hwan Kwak, Yi Na Jeong, Jeong In Oh, Mu Yong Kim
  • 7-(4-aminomethyl-3-methyloxyiminopyrroplidin-1-yl)-1-cyclopropyl-6-flu oro-4-oxo-1,4-dihydro-1,8-naphthyridine-3-carboxylic acid and the process for the preparation thereof
    Patent number: 5776944
    Abstract: The present invention relates to a novel quinolone compound having an excellent antibacterial activity. More specifically, the present invention relates to 7-(4-aminomethyl-3-methyloxyiminopyrrolidin-1-yl)-1-cyclopropyl-6-fluoro-4 -oxo-1, 4-dihydro-1,8-naphthyridine-3-carboxylic acid represent by the following formula: ##STR1## or its isomer.
    Type: Grant
    Filed: April 4, 1997
    Date of Patent: July 7, 1998
    Assignee: LG Chemical Ltd.
    Inventors: Chang Yong Hong, Young Kwan Kim, Se Ho Kim, Jay Hyok Chang, Hoon Choi, Do Hyun Nam, Ae Ri Kim, Jin Hwa Lee, Ki Sook Park
  • Quinoline carboxylic acid derivatives having 7-(4-amino-methyl-3-oxime)pyrrolidine substituent and processes for preparing thereof
    Patent number: 5698570
    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 antibactrial 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: January 30, 1997
    Date of Patent: December 16, 1997
    Assignee: LG Chemical Ltd.
    Inventors: Chang Yong Hong, Young Kwan Kim, Jay Hyok Chang, Se Ho Kim, Hoon Choi, Do Hyun Nam, Jin Hwan Kwak, Yi Na Jeong, Jeong In Oh, Mu Yong Kim