Granted Patent
Utility
US 5,681,542 · App. 08/472,864
Compositions comprising a biocompatible gas and a polymer for magnetic resonance imaging
Inventor:
Evan C. Unger
Patented Case
View Patent ↗
Granted: Oct 28, 1997
Filed: Jun 7, 1995
Inventor
Evan C. Unger
Assignee (at issue)
ImaRx 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.