Granted Patent
Utility
US 4,285,895 · App. 06/078,129
Method of densifying a reaction bonded silicon nitride article
Inventors:
John A. Mangels, Gerald J. Tennenhouse
Patented Case
View Patent ↗
Granted: Aug 25, 1981
Filed: Sep 24, 1979
Inventors
John A. Mangels
Gerald J. Tennenhouse
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.