Granted Patent
Utility
US 4,897,470 · App. 07/034,879
Anthracycline antibiotics DCP-1 and 2
Inventors:
Akihiro Yoshimoto, Osamu Jodo, Yoshio Watanabe, Tomoyuki Ishikura, Tsutomu Sawa, Tomio Takeuchi, Hamao Umezawa
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Apr 6, 1987
Inventors
Akihiro Yoshimoto
Osamu Jodo
Yoshio Watanabe
Tomoyuki Ishikura
Tsutomu Sawa
Tomio Takeuchi
Hamao Umezawa
Assignee (at issue)
Sanraku Incorporated
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.