Granted Patent
Utility
US 5,409,688 · App. 07/893,657
Gaseous ultrasound contrast media
Inventor:
Steven C. Quay
Patented Case
View Patent ↗
Granted: Apr 25, 1995
Filed: Jun 5, 1992
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.