Granted Patent
Utility
US 5,614,638 · App. 07/894,691
Nonionic radiographic contrast agents
Inventors:
Ramachandran Ranganathan, Thangavel Arunchalam, Edmund R. Marinelli, Radhakrishna K. Pillai
Patented Case
View Patent ↗
Granted: Mar 25, 1997
Filed: Jun 5, 1992
Inventors
Ramachandran Ranganathan
Thangavel Arunchalam
Edmund R. Marinelli
Radhakrishna K. Pillai
Assignee (at issue)
Bracco International BV
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.