Granted Patent
Utility
US 6,004,895 · App. 09/038,746
Pigmented silicon nitride
Inventors:
Chienchung James Shih, Andre Ezis
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Mar 11, 1998
Inventors
Chienchung James Shih
Andre Ezis
Assignee (at issue)
Ceradyne, 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.