Granted Patent
Utility
US 4,286,985 · App. 06/135,917
Vortex melting system
Inventors:
Jan H. L. van Linden, Jeffrey B. Gorss
Patented Case
View Patent ↗
Granted: Sep 1, 1981
Filed: Mar 31, 1980
Inventors
Jan H. L. van Linden
Jeffrey B. Gorss
Assignee (at issue)
Aluminum Company of America
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.