Patents by Inventor Ho Sik Roh

Ho Sik Roh 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).

  • Hydroxy pyranone derivative and preparation method thereof
    Patent number: 6916844
    Abstract: The present invention provides hydroxy pyranone derivatives and a method for preparing the hydroxy pyranone derivatives. The hydroxy pyranone derivatives of the present invention are significantly effective in promoting the biosynthesis of collagen and in inhibiting the activity of collagenase, i.e. an enzyme for decomposing collagen, to have anti-wrinkle efficacy, and can be incorporated into medicines or external applications for lessening skin-wrinkles.
    Type: Grant
    Filed: May 9, 2003
    Date of Patent: July 12, 2005
    Assignee: Amorepacific Corporation
    Inventors: Ho Sik Roh, Su Nam Kim, Bae Hwan Kim, Hae Kwang Lee, Duck Hee Kim, Ih Seop Chang, Ok Sub Lee
  • Hydroxy pyranone derivative and preparation method thereof
    Publication number: 20030236299
    Abstract: The present invention provides hydroxy pyranone derivatives and a method for preparing the hydroxy pyranone derivatives. The hydroxy pyranone derivatives of the present invention are significantly effective in promoting the biosynthesis of collagen and in inhibiting the activity of collagenase, i.e. an enzyme for decomposing collagen, to have anti-wrinkle efficacy, and can be incorporated into medicines or external applications for lessening skin-wrinkles.
    Type: Application
    Filed: May 9, 2003
    Publication date: December 25, 2003
    Inventors: Ho Sik Roh, Su Nam Kim, Bae Hwan Kim, Hae Kwang Lee, Duck Hee Kim, Ih Seop Chang, Ok Sub Lee