Granted Patent
Utility
US 5,292,411 · App. 07/892,913
Method and apparatus for cathodically protecting reinforced concrete structures
Inventors:
John J. Bartholomew, John E. Bennett, Barry L. Martin, Thomas A. Mitchell
Patented Case
View Patent ↗
Granted: Mar 8, 1994
Filed: Jun 3, 1992
Inventors
John J. Bartholomew
John E. Bennett
Barry L. Martin
Thomas A. Mitchell
Assignee (at issue)
Eltech Systems Corporation
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.