Granted Patent
Utility
US 3,960,581 · App. 05/465,222
Process for producing a solid solution of aluminum oxide in silicon nitride
Inventor:
Ivan B. Cutler
Patented Case
View Patent ↗
Granted: Jun 1, 1976
Filed: Apr 29, 1974
Inventor
Ivan B. Cutler
Assignee (at issue)
THE UNIVERSITY OF UTAH
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.