Granted Patent
Utility
US 5,233,995 · App. 07/795,590
Encapsulated particles useful as contrast agents in ultrasound and x-ray imaging compositions and methods
Inventors:
Joseph S. Yudelson, Robert O. James, Denis M. Bailey
Patented Case
View Patent ↗
Granted: Aug 10, 1993
Filed: Nov 21, 1991
Inventors
Joseph S. Yudelson
Robert O. James
Denis M. Bailey
Assignee (at issue)
Sterling Winthrop 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.