Granted Patent
Utility
US 4,458,883 · App. 06/325,460
Molten metal fume suppression
Inventors:
Laird D. Billings, LaMar S. Hills, Jr., Jay R. Hopkins
Patented Case
View Patent ↗
Granted: Jul 10, 1984
Filed: Nov 27, 1981
Inventors
Laird D. Billings
LaMar S. Hills, Jr.
Jay R. Hopkins
Assignee (at issue)
United States Steel 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.