Patents by Inventor Eun-Rhan Woo

Eun-Rhan Woo 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-ammoniopropenyl cephalosporin compounds as antibacterial agents and process for preparing the same
    Patent number: 5872249
    Abstract: A 3-ammoniopropenyl cephalosporin of the following formula (I): ##STR1## wherein P is hydroxylated alicyclic or aliphatic amines such as meso-3,4-dihydroxy-1-methylpyrrolidine, (3S,4S)-3,4-dihydroxy-1-methylpyrrolidine, (3R,4R)-3,4-dihydroxy-1-methylpyrrolidine, rac-3,4-trans-dihydroxy-1-methylpyrrlidine, (2S,4R)-4-hydroxy-1-methyl-2-pyrrolidinemethanol, N-methyl-bis(2-hydroxyethyl)amine, 3,4-cis-dihydroxy-1-methylpiperidine, 3,4-trans-dihydroxypiperidine, 4-hydroxy-1-methylpiperidine, 2-hydroxymethyl-1-methylpiperidine, or tropine, or a pharmaceutically acceptable salt thereof, exhibits good anti-bacterial activities against a wide variety of Gram-positive and Gram-negative bacteria; and a process for the preparation thereof.
    Type: Grant
    Filed: September 30, 1997
    Date of Patent: February 16, 1999
    Assignee: Korea Institute of Science and Technology
    Inventors: Hokoon Park, Yong Sup Lee, Jae Yeol Lee, Dae Hwan Suk, Eun-Rhan Woo
  • 3-ammoniopropenyl cephalosporin compounds as antibacterial agents
    Patent number: 5675003
    Abstract: A 3-ammoniopropenyl cephalosporin of the following formula (I): ##STR1## wherein P is hydroxylated alicyclic or aliphatic amines such as meso-3,4-dihydroxy-1-methylpyrrolidine, (3S,4S)-3,4-dihydroxy-1-methylpyrrolidine, (3R,4R)-3,4-dihydroxy-1-methylpyrrolidine, rac-3,4-trans-dihydroxy-1-methylpyrrlidine, (2S,4R)-4-hydroxy-1-methyl-2-pyrrolidinemethanol, N-methyl-bis(2-hydroxyethyl)amine, 3,4-cis-dihydroxy-1-methylpiperidine, 3,4-trans-dihydroxypiperidine, 4-hydroxy-1-methylpiperidine, 2-hydroxymethyl-1-methylpiperidine, or tropine, or a pharmaceutically acceptable salt thereof, exhibits good anti-bacterial activities against a wide variety of Gram-positive and Gram-negative bacteria; and a process for the preparation thereof.
    Type: Grant
    Filed: September 1, 1995
    Date of Patent: October 7, 1997
    Assignee: Korea Institute of Science and Technology
    Inventors: Hokoon Park, Yong Sup Lee, Jae Yeol Lee, Dae Hwan Suk, Eun-Rhan Woo
  • Cephalosporin compounds and processes for preparing thereof
    Patent number: 5571909
    Abstract: Quaternary ammoniocephalosporins of formula(I) wherein Q.dbd.CH or N, P.dbd.hydroxylated amine or hydroxylated heterocyclylamines including N-methyl-bis(2-hydroxyethyl)amine, rac-3,4-trans-dihydroxy-1-methylpyrrolidine, (3S, 4S)-3,4-dihydroxy-1-methylpyrrolidine, (3R,4R)-3,4-dihydroxy-1-methylpyrrolidine, meso-3,4-dihydorcy-1-methylpyrrolidine, (2S, 4R)-4-hydroxy-1-methyl-2-pyrrolidinemethanol 3,4-cis-dihydroxy-1-methylpiperidine, 3,4-trans-dihydroxy-1-methylpiperidine, or tropine, and preparation methods are disclosed.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: November 5, 1996
    Assignee: Korea Institute of Science and Technology
    Inventors: Hokoon Park, Sun Ho Jung, Yong Sup Lee, Jae Yeol Lee, Eun-Rhan Woo