Granted Patent
Utility
US 5,718,416 · App. 08/594,727
Lid and containment vessel for refining molten metal
Inventors:
Peter J. Flisakowski, David Charles Griffith, Jr.
Patented Case
View Patent ↗
Granted: Feb 17, 1998
Filed: Jan 30, 1996
Inventors
Peter J. Flisakowski
David Charles Griffith, Jr.
Assignee (at issue)
PYROTEK, INC.
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.