Granted Patent
Utility
US 6,528,039 · App. 08/878,233
Low density microspheres and their use as contrast agents for computed tomography and in other applications
Inventor:
Evan C. Unger
Patented Case
View Patent ↗
Granted: Mar 4, 2003
Filed: Jun 18, 1997
Inventor
Evan C. Unger
Assignee (at issue)
Bristol Myers Squibb Medical Imaging, 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.