Patents by Inventor Duck Hoo Kim

Duck Hoo Kim 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).

  • Hydroxamic acid derivatives and the preparation method thereof
    Patent number: 7485750
    Abstract: The present invention provides hydroxamic acid derivatives represented by the formula, having antioxidation, collagen biosynthesis promotion and skin pore contraction effects, and a method for preparation thereof. Further, the present invention provides skin-care external compositions for preventing skin aging, containing said hydroxamic acid derivatives represented by the formula as an active ingredient.
    Type: Grant
    Filed: March 21, 2006
    Date of Patent: February 3, 2009
    Assignee: Amorepacific Corporation
    Inventors: Ho Sik Rho, Heung Soo Baek, Jeong A. Lee, Chang Man Park, Duck Hoo Kim, Ih Soop Chang, Ok Sub Lee
  • Hydroxamic Acid Derivatives and the Preparation Method Thereof
    Publication number: 20080242730
    Abstract: The present invention provides hydroxamic acid derivatives represented by the formula, having antioxidation, collagen biosynthesis promotion and skin pore contraction effects, and a method for preparation thereof. Further, the present invention provides skin-care external compositions for preventing skin aging, containing said hydroxamic acid derivatives represented by the formula as an active ingredient.
    Type: Application
    Filed: March 21, 2006
    Publication date: October 2, 2008
    Inventors: Ho Sik Rho, Heung Soo Baek, Jeong A. Lee, Chang Man Park, Duck Hoo Kim, Ih Soop Chang, Ok Sub Lee