Granted Patent
Utility
US 6,089,308 · App. 09/163,632
Method and apparatus for improving the quality of continuously cast metal
Inventors:
Rudolf Roder, Marcel Witschi
Patented Case
View Patent ↗
Granted: Jul 18, 2000
Filed: Sep 30, 1998
Inventors
Rudolf Roder
Marcel Witschi
Assignee (at issue)
Nichols Aluminum
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.