Granted Patent
Utility
US 5,110,772 · App. 07/575,102
Fabrication of dense SI.sub.3 N.sub.4 ceramics using CaO-TiO.sub.2 SiO.sub. 2
Inventor:
Frederick J. Parker
Patented Case
View Patent ↗
Granted: May 5, 1992
Filed: Aug 30, 1990
Inventor
Frederick J. Parker
Assignee (at issue)
W.R. Grace & Co. Conn.
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.