Granted Patent
Utility
US 4,298,377 · App. 06/099,583
Vortex reactor and method for adding solids to molten metal therewith
Inventor:
Andrew Geza Szekely
Patented Case
View Patent ↗
Granted: Nov 3, 1981
Filed: Dec 3, 1979
Inventor
Andrew Geza Szekely
Assignee (at issue)
Union Carbide 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.