Granted Patent
Utility
US 5,330,739 · App. 07/985,415
Iodinated benzoyl acetals and ketals for x-ray imaging
Inventor:
Carl R. Illig
Patented Case
View Patent ↗
Granted: Jul 19, 1994
Filed: Dec 4, 1992
Inventor
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.