Granted Patent
Utility
US 4,880,755 · App. 07/333,716
Sialon cutting tool composition
Inventor:
Pankaj K. Mehrotra
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Apr 3, 1989
Inventor
Pankaj K. Mehrotra
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.