Granted Patent
Utility
US 5,527,521 · App. 08/456,738
Low density microspheres and suspensions and their use as contrast agents for computed tomography and in other applications
Inventor:
Evan C. Unger
Patented Case
View Patent ↗
Granted: Jun 18, 1996
Filed: Jun 1, 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.