Patents by Inventor Duc-Ky Hahn

Duc-Ky Hahn 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).

  • Asiatic acid derivatives its manufacturing method and dermatological agent containing it
    Patent number: 5834437
    Abstract: The object of the present invention is to provide asiatic acid derivatives, its pharmaceutically acceptable salts or esters.Asiatic acid, its trisaccharide asiaticoside and mddecassic acid, extracted from Centella asiatica have been used for a long time in the management of skin scars and chronic ulcers. In this invention, asiatic acid derivatives synthesized from asiatic acid show excellent wound-healing properties.
    Type: Grant
    Filed: December 1, 1995
    Date of Patent: November 10, 1998
    Assignee: Dong Kook Pharmaceutical Co., Ltd.
    Inventors: Sang-Sup Jew, Hee-Doo Kim, Young-Hoon Jung, Eun-Hee Park, Sung-Ki Seo, Tae-Gyu Nam, Duc-Ky Hahn, Jae-Ho Park, Pil-Jong Sim, Min-Jung Lim, Kyung-Haw Lim