Granted Patent
Utility
US 5,573,751 · App. 08/361,118
Persistent gaseous bubbles as ultrasound contrast media
Inventor:
Steven C. Quay
Patented Case
View Patent ↗
Granted: Nov 12, 1996
Filed: Dec 21, 1994
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.