Granted Patent
Utility
US 4,690,790 · App. 06/758,184
Silicon nitride/silicon carbide composition and articles thereof
Inventor:
Carl H. Bates
Patented Case
View Patent ↗
Granted: Sep 1, 1987
Filed: Jul 23, 1985
Inventor
Carl H. Bates
Assignee (at issue)
Stemcor Corporation
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.