Granted Patent
Utility
US 5,288,340 · App. 07/746,427
Method of improving the corrosion resistance of carbonitrided components made of ferrous materials
Inventors:
Ulrich Christ, Helmut Kunst, Georg Wahl
Patented Case
View Patent ↗
Granted: Feb 22, 1994
Filed: Aug 16, 1991
Inventors
Ulrich Christ
Helmut Kunst
Georg Wahl
Assignee (at issue)
Degussa AG
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.