Granted Patent
Utility
US 4,224,440 · App. 05/921,816
1-(3,5-Disubstituted-2,4,6-triiodophenly)-3-(polyhydroxy-alkyl)urea compounds
Inventor:
Kenneth R. Smith
Patented Case
View Patent ↗
Granted: Sep 23, 1980
Filed: Jul 3, 1978
Inventor
Kenneth R. Smith
Assignee (at issue)
MALLINCKRODT LLC
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.