Granted Patent
Utility
US 5,420,176 · App. 08/058,098
Contrast media for ultrasonic imaging
Inventors:
Evan C. Unger, Guanli Wu
Patented Case
View Patent ↗
Granted: May 30, 1995
Filed: May 5, 1993
Inventors
Evan C. Unger
Guanli Wu
Assignee (at issue)
ImaR.sub.x Pharmaceutical Corp.
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.