Granted Patent
Utility
US 5,366,539 · App. 07/931,716
Process for the desulphurization treatment of pig iron melts
Inventors:
Karl-Heinz Abele, Heinz van den Boom, Alfred Ender, Eckart Hees, Walter Meichsner
Patented Case
View Patent ↗
Granted: Nov 22, 1994
Filed: Aug 18, 1992
Inventors
Karl-Heinz Abele
Heinz van den Boom
Alfred Ender
Eckart Hees
Walter Meichsner
Assignee (at issue)
Thyssen Stahl AG
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.