Granted Patent
Utility
US 4,477,402 · App. 06/528,228
Method of making silicon nitride comprising objects
Inventor:
Andre Ezis
Patented Case
View Patent ↗
Granted: Oct 16, 1984
Filed: Jul 19, 1983
Inventor
Andre Ezis
Assignee (at issue)
Ford Motor Company
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.