Granted Patent
Utility
US 6,328,863 · App. 09/365,761
Spiral feed and discharge manifold for electrolytic cells
Inventors:
Robert L. Wilhelm, William A. Nutter
Patented Case
View Patent ↗
Granted: Dec 11, 2001
Filed: Aug 3, 1999
Inventors
Robert L. Wilhelm
William A. Nutter
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.