Granted Patent
Utility
US 5,457,323 · App. 08/296,071
Process for stripping radon-220 from radioactive isotope mixture
Inventor:
Maurtis W. Geerlings
Patented Case
View Patent ↗
Granted: Oct 10, 1995
Filed: Aug 24, 1994
Inventor
Maurtis W. Geerlings
Assignee (at issue)
AKZO NOBEL N.V.
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.