Granted Patent
Utility
US 5,332,422 · App. 08/088,014
Solid lubricant and hardenable steel coating system
Inventor:
V. Durga Nageswar Rao
Patented Case
View Patent ↗
Granted: Jul 26, 1994
Filed: Jul 6, 1993
Inventor
V. Durga Nageswar Rao
Assignee (at issue)
Ford Motor Company
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.