Granted Patent
Utility
US 6,553,597 · App. 09/793,434
Ingot cleaning apparatus
Inventor:
Edward E. Anderson
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Feb 27, 2001
Inventor
Edward E. Anderson
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.