Granted Patent
Utility
US 6,562,229 · App. 08/854,332
Louvered anode for cathodic protection systems
Inventors:
John William Burgher, Dennis F. Dong, Richard E. Loftfield
Patented Case
View Patent ↗
Granted: May 13, 2003
Filed: May 12, 1997
Inventors
John William Burgher
Dennis F. Dong
Richard E. Loftfield
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.