Granted Patent
Utility
US 5,334,381 · App. 08/085,608
Liposomes as contrast agents for ultrasonic imaging and methods for preparing the same
Inventor:
Evan C. Unger
Patented Case
View Patent ↗
Granted: Aug 2, 1994
Filed: Jun 30, 1993
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.