Granted Patent
Utility
US 5,658,678 · App. 08/584,874
Corrosion resistant cermet wear parts
Inventors:
William M. Stoll, James P. Materkowski, Ted R. Massa
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Jan 11, 1996
Inventors
William M. Stoll
James P. Materkowski
Ted R. Massa
Assignee (at issue)
KENNAMETAL INC.
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.