Patents by Inventor Chun Ja Nam

Chun Ja 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).

  • Tocopherol derivatives and method for preparation thereof
    Patent number: 6410752
    Abstract: An object of the present invention is to provide the tocopherol derivatives represented by the following formula (I), and their salts: Wherein, R1, R2 and R3 are H or methyl group, and at least one positions selected from group consisting of the R1, R2 and R3 positions are methyl group; and, A is CH2—CH(CH3)— or CH═C(CH3)— The other object of the present invention is to provide a method for preparing the above tocopherol derivatives. The tocopherol derivatives is prepared by reacting tocopherol with phosphorous oxychloride in an equivalent ratio of 1:1˜1.3, in presence of an organic base, in an organic solvent; reacting the tocopherol dichlorophosphate produced by the above reaction with 3-aminopropanol in presence of an organic base, in an organic solvent; and, hydrolyzing the above products.
    Type: Grant
    Filed: January 9, 2001
    Date of Patent: June 25, 2002
    Assignee: Pacific Corporation
    Inventors: Kil Joong Kim, Duck Hee Kim, Ho Sik Rho, Jae Won You, Chun Ja Nam, Jong Eoun Hong, Hak Hee Kang, Ih Seob Chang
  • Tocopherol derivatives and method for preparation thereof
    Publication number: 20020045765
    Abstract: An object of the present invention is to provide the tocopherol derivatives represented by the following formula (I), and their salts: 1
    Type: Application
    Filed: January 9, 2001
    Publication date: April 18, 2002
    Inventors: Kil Joong Kim, Duck Hee Kim, Ho Sik Rho, Jae Won You, Chun Ja Nam, Jong Eoun Hong, Hak Hee Kang, Ih Seop Chang