Granted Patent
Utility
US 5,972,518 · App. 08/901,246
Corrosion protection of iron/steel by emeraldine base polyaniline
Inventors:
Arthur J. Epstein, Shashi Jasty
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Jul 28, 1997
Inventors
Arthur J. Epstein
Shashi Jasty
Assignee (at issue)
OHIO STATE UNIVERSITY
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.