Granted Patent
Utility
US 4,309,159 · App. 06/156,721
Refractory nozzle
Inventor:
John F. Holic, Jr.
Patented Case
View Patent ↗
Granted: Jan 5, 1982
Filed: Jun 5, 1980
Inventor
John F. Holic, Jr.
Assignee (at issue)
CRUCIBLE, LLC
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.