Granted Patent
Utility
US 5,543,132 · App. 08/227,422
X-ray contrast compositions containing a barium salt and a cellulose derivative
Inventors:
Edward J. Baker, Robert W. Lee, John L. Toner, Carl R. Illig
Patented Case
View Patent ↗
Granted: Aug 6, 1996
Filed: Apr 14, 1994
Inventors
Edward J. Baker
Robert W. Lee
John L. Toner
Carl R. Illig
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.