Patents by Inventor Byeong Gi Kong

Byeong Gi Kong 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).

  • Method for preparing water-soluble free amine chitosan
    Patent number: 7345165
    Abstract: A method for the preparation of water-soluble chitosan with high purity and biological activity includes steps of: reacting chitosan oligo sugar acid salt, covalently bonded to an organic or inorganic acid, with trialkylamine in phosphate buffered saline followed by addition of an organic solvent to remove acid salt at C-2 position; adding the thus obtained reaction mixture to an inorganic acid to remove trialkylamine salt at C-6 position; and passing the thus obtained free amine chitosan through an activated carbon/ion exchange resin. The free amine chitosan is water-soluble and has a high bioavailability for application to the medicine and food industries.
    Type: Grant
    Filed: April 16, 2002
    Date of Patent: March 18, 2008
    Assignee: Jae Woon Nah
    Inventors: Mi Kyeong Jang, Chang Yong Choi, Won Seok Kim, Byeong Gi Kong, Young Il Jeong, Hyun Pil Yang, Ji Tae Jang
  • Method for preparaing water-soluble free amine chitosan
    Publication number: 20040260077
    Abstract: A method for the preparation of water-soluble chitosan with high purity and biological activity includes steps of: reacting chitosan oligo sugar acid salt, covalently bonded to an organic or inorganic acid, with trialkylamine in phosphate buffered saline followed by addition of an organic solvent to remove acid salt at C-2 position; adding the thus obtained reaction mixture to an inorganic acid to remove trialkylamine salt at C-6 position; and passing the thus obtained free amine chitosan through an activated carbon/ion exchange resin. The free amine chitosan is water-soluble and has a high bioavailability for application to the medicine and food industries.
    Type: Application
    Filed: March 12, 2004
    Publication date: December 23, 2004
    Inventors: Mi Kyeong Jang, Chang Yong Choi, Won Seok Kim, Byeong Gi Kong, Young Il Jeong, Hyun Pil Yang, Ji Tae Jang