Granted Patent
Utility
US 4,290,855 · App. 06/108,778
Method of isotope enrichment
Inventor:
Patrick H. O'Farrell
Patented Case
View Patent ↗
Granted: Sep 22, 1981
Filed: Dec 31, 1979
Inventor
Patrick H. O'Farrell
Assignee (at issue)
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA
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.