Granted Patent
Utility
US 4,834,963 · App. 06/942,333
Macrocrystalline tungsten monocarbide powder and process for producing
Inventors:
Charles J. Terry, Jack D. Frank
Patented Case
View Patent ↗
Granted: May 30, 1989
Filed: Dec 16, 1986
Inventors
Charles J. Terry
Jack D. Frank
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.