Granted Patent
Utility
US 5,286,468 · App. 07/658,503
Producing carbon-14 isotope from spent resin waste
Inventors:
Francis H. Chang, Harold K. Vogt, Leonard S. Krochmalnek, Savtantar K. Sood, Frank E. Bartoszek, Kenneth Woodall, Jeffrey R. Robins
Patented Case
View Patent ↗
Granted: Feb 15, 1994
Filed: Feb 21, 1991
Inventors
Francis H. Chang
Harold K. Vogt
Leonard S. Krochmalnek
Savtantar K. Sood
Frank E. Bartoszek
Kenneth Woodall
Jeffrey R. Robins
Assignee (at issue)
Ontario Hydro
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.