Granted Patent
Utility
US 5,344,638 · App. 08/031,384
Compositions of iodobenzoic acid derivatives for visualization of the gastrointestinal tract
Inventors:
Carl R. Illig, Brent Douty
Patented Case
View Patent ↗
Granted: Sep 6, 1994
Filed: Mar 11, 1993
Inventors
Carl R. Illig
Brent Douty
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.