Granted Patent
Utility
US 6,561,259 · App. 10/041,818
Method of melting titanium and other metals and alloys by plasma arc or electron beam
Inventors:
Frank Spadafora, Kuang-O Yu
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: Oct 19, 2001
Inventors
Frank Spadafora
Kuang-O Yu
Assignee (at issue)
RMI Titanium Company
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.