Granted Patent
Utility
US 6,652,886 · App. 09/785,525
Biodegradable cationic copolymers of poly (alkylenimine) and poly (ethylene glycol) for the delivery of bioactive agents
Inventors:
Cheol-hee Ahn, Sung Wan Kim
Patented Case
View Patent ↗
Granted: Nov 25, 2003
Filed: Feb 16, 2001
Inventors
Cheol-hee Ahn
Sung Wan Kim
Assignee (at issue)
Expression Genetics, Inc.
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.