Patents by Inventor Hong Chung Il

Hong Chung Il 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).

  • Process of preparing camptothecin derivatives
    Patent number: 6310207
    Abstract: A process of preparing camptothecin derivatives of formula 1 is disclosed
    Type: Grant
    Filed: January 5, 2000
    Date of Patent: October 30, 2001
    Assignee: Chong Kun Dang Corp.
    Inventors: Hong Chung Il, Jung Woo Kim, Sang Joon Lee, Soon Kil Ahn, Nam Song Choi, Kye Kwang Kim, Byeong Seon Jeong