Granted Patent
Utility
US 4,778,526 · App. 06/920,269
Gunnable refractory composition
Inventor:
Nicholas Cassens, Jr.
Patented Case
View Patent ↗
Granted: Oct 18, 1988
Filed: Oct 14, 1986
Inventor
Nicholas Cassens, Jr.
Assignee (at issue)
National Refractories & Minerals 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.