Granted Patent
Utility
US 4,773,980 · App. 07/111,192
Process and apparatus for sealing cathodic bars in a prestressed condition
Inventors:
Laurent Michard, Gabriel Audras
Patented Case
View Patent ↗
Granted: Sep 27, 1988
Filed: Oct 22, 1987
Inventors
Laurent Michard
Gabriel Audras
Assignees (at issue)
Aluminum Pechiney
Societe des Electrodes & Refractaires Savoie
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.