Granted Patent
Utility
US 4,735,795 · App. 06/648,195
Alkylammonium complexes of diatrizoic acid as X-ray contrast agents
Inventors:
Malcolm Robinson, Frank Ridgway, Peter Timmins
Patented Case
View Patent ↗
Granted: Apr 5, 1988
Filed: Sep 7, 1984
Inventors
Malcolm Robinson
Frank Ridgway
Peter Timmins
Assignee (at issue)
E.R. SQUIBB & SONS. 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.