Granted Patent
Utility
US 5,609,867 · App. 08/521,505
Polymeric antitumor agents
Inventor:
Hwei-Ru Tsou
Patented Case
View Patent ↗
Granted: Mar 11, 1997
Filed: Aug 29, 1995
Inventor
Hwei-Ru Tsou
Assignee (at issue)
American Cyanamid Company
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.