Granted Patent
Utility
US 6,156,292 · App. 08/770,522
Gaseous ultrasound contrast media and method for selecting gases for use as ultrasound contrast media
Inventor:
Steven C. Quay
Patented Case
View Patent ↗
Granted: Dec 5, 2000
Filed: Dec 20, 1996
Inventor
Steven C. Quay
Assignee (at issue)
Sonus Pharmaceuticals, 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.