Patents by Inventor Gha-Seung Park

Gha-Seung Park 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).

  • Process for preparing 7-amino-3-methoxymethyl-3-cephem-4-carboxylic acid
    Patent number: 6620930
    Abstract: 7-amino-3-methoxymethyl-3-cephem-4-carboxylic acid of formula (I) can be easily prepared by reacting 7-aminocephalosporanic acid of formula (II) with an azeotropic mixture of trimethyl borate and methanol in the presence of methanesulfonic acid:
    Type: Grant
    Filed: April 4, 2002
    Date of Patent: September 16, 2003
    Assignee: Hanmi Pharm. Co., Ltd.
    Inventors: Gwan-Sun Lee, Jae-Heon Lee, Young-Kil Chang, Chul-Hyun Park, Gha-Seung Park, Cheol-Kyung Kim
  • Method of preparing cephalosporins using 4-hydroxyphenylglycine derivatives
    Publication number: 20020120136
    Abstract: High purity cephalosporin compound can be easily prepared in a high yield by a process comprising the steps of: reacting a cephem compound with a 4-hydroxyphenylglycine derivative.
    Type: Application
    Filed: February 25, 2002
    Publication date: August 29, 2002
    Inventors: Gwan-Sun Lee, Jae-Heon Lee, Young-Kil Chang, Hong-Sun Kim, Chul-Hyun Park, Gha-Seung Park, Cheol-Kyung Kim