Granted Patent
Utility
US 4,632,793 · App. 06/848,845
Method of fabricating hot pressed silicon nitride billets
Inventors:
Andre Ezis, Elaine C. Beckwith, Warren Copple
Patented Case
View Patent ↗
Granted: Dec 30, 1986
Filed: Apr 3, 1986
Inventors
Andre Ezis
Elaine C. Beckwith
Warren Copple
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.