Granted Patent
Utility
US 5,385,721 · App. 08/217,138
Compositions of alkylbenzenes and cellulose derivatives for visualization of the gastrointestinal tract
Inventors:
Edward J. Baker, Kurt A. Josef, Edward R. Bacon, Kimberly G. Estep, Carl R. Illig, Brent Douty, John L. Toner, Robert W. Lee
Patented Case
View Patent ↗
Granted: Jan 31, 1995
Filed: Mar 22, 1994
Inventors
Edward J. Baker
Kurt A. Josef
Edward R. Bacon
Kimberly G. Estep
Carl R. Illig
Brent Douty
John L. Toner
Robert W. Lee
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.