Granted Patent
Utility
US 6,589,405 · App. 09/855,293
Multilayer oxide coated valve metal electrode for water purification
Inventors:
Oleh Weres, Henry Edward O'Donnell
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: May 14, 2001
Inventors
Oleh Weres
Henry Edward O'Donnell
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.