Granted Patent
Utility
US 6,572,713 · App. 09/932,155
Grain-refined austenitic manganese steel casting having microadditions of vanadium and titanium and method of manufacturing
Inventors:
Jerzy W. Kucharczyk, Karl Funk, Bernd Kos
Patented Case
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Granted: Jun 3, 2003
Filed: Aug 17, 2001
Inventors
Jerzy W. Kucharczyk
Karl Funk
Bernd Kos
Assignee (at issue)
The Frog Switch and Manufacturing Company
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.