Granted Patent
Utility
US 4,820,663 · App. 07/092,118
Whisker reinforced ceramic and a method of clad/hot isostatic pressing same
Inventors:
Pankaj K. Mehrotra, Joyce L. Swiokla, Elizabeth R. Billman
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: Sep 2, 1987
Inventors
Pankaj K. Mehrotra
Joyce L. Swiokla
Elizabeth R. Billman
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.