Granted Patent
Utility
US 5,456,901 · App. 08/395,683
Liposomes as contrast agents for ultrasonic imaging
Inventor:
Evan C. Unger
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Feb 28, 1995
Inventor
Evan C. Unger
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.