Granted Patent
Utility
US 4,717,429 · App. 06/893,513
Process for the removal of alkali metal nitrite from nitrate containing salt baths
Inventors:
Helmut Kunst, Christian Scondo
Patented Case
View Patent ↗
Granted: Jan 5, 1988
Filed: Aug 5, 1986
Inventors
Helmut Kunst
Christian Scondo
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.