Granted Patent
Utility
US 6,310,207 · App. 09/462,271
Process of preparing camptothecin derivatives
Inventors:
Hong Chung Il, Jung Woo Kim, Sang Joon Lee, Soon Kil Ahn, Nam Song Choi, Kye Kwang Kim, Byeong Seon Jeong
Patented Case
View Patent ↗
Granted: Oct 30, 2001
Filed: Jan 5, 2000
Inventors
Hong Chung Il
Jung Woo Kim
Sang Joon Lee
Soon Kil Ahn
Nam Song Choi
Kye Kwang Kim
Byeong Seon Jeong
Assignee (at issue)
Chong Kun Dang Corporation
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.