Granted Patent
Utility
US 5,853,553 · App. 08/003,049
Sacrificial anode and method of making same
Inventor:
Richard Twigg
Patented Case
View Patent ↗
Granted: Dec 29, 1998
Filed: Jan 5, 1998
Inventor
Richard Twigg
Assignee (at issue)
Alumax Extrusions Inc.
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.