Granted Patent
Utility
US 6,203,588 · App. 09/189,667
Method of producing a grinding roll
Inventors:
Heinz Schroder, Helmut Lucke, Ludger Rubbelke
Patented Case
View Patent ↗
Granted: Mar 20, 2001
Filed: Nov 11, 1998
Inventors
Heinz Schroder
Helmut Lucke
Ludger Rubbelke
Assignees (at issue)
Krupp Polysius AG
Schwabische Huttenwerke GmbH
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.