Granted Patent
Utility
US 4,501,723 · App. 06/527,643
Method of making yttrium silicon oxynitrides
Inventors:
Andre Ezis, Howard D. Blair
Patented Case
View Patent ↗
Granted: Feb 26, 1985
Filed: Jul 19, 1983
Inventors
Andre Ezis
Howard D. Blair
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.