Patents by Inventor Jae-Heon Lee

Jae-Heon Lee 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).

  • Pharmaceutical composition comprising crystalline sibutramine methanesulfonate hemihydrate
    Publication number: 20040068018
    Abstract: The present invention relates to a pharmaceutical composition for treating or preventing obesity, comprising novel crystalline sibutramine methanesulfonate hemihydrate of formula (I). The crystalline sibutramine methanesulfonate hemihydrate according to the present invention has a much higher solubility in water, and enhanced stability under a high humidity/temperature condition, as compared with sibutramine hydrochloride monohydrate.
    Type: Application
    Filed: October 3, 2003
    Publication date: April 8, 2004
    Inventors: Jae-Heon Lee, Gha-Seung Park, Jae-Cheol Lee, Han-Kyong Kim, Young-Kil Chang, Gwan-Sun Lee
  • Method of preparing highly pure cefpodoxime proxetil
    Patent number: 6639068
    Abstract: Highly pure cefpodoxime proxetil can be prepared by a simple process comprising the step of reacting a cefpodoxime salt with 1-iodoethylisopropylcarbonate in an organic solvent in the presence of a crown ether.
    Type: Grant
    Filed: April 24, 2002
    Date of Patent: October 28, 2003
    Assignee: Hanmi Pharm. Co., Ltd.
    Inventors: Gwan-Sun Lee, Young-Kil Chang, Jae-Heon Lee, Chul-Hyun Park, Gha-Seung Park, Keum-Shin Jung
  • 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