Granted Patent
Utility
US 6,737,030 · App. 10/059,680
Method for separating hafnium from zirconium
Inventors:
James A. Sommers, Jeff G. Perrine
Patented Case
View Patent ↗
Granted: May 18, 2004
Filed: Jan 29, 2002
Inventors
James A. Sommers
Jeff G. Perrine
Assignee (at issue)
ATI PROPERTIES 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.