Granted Patent
Utility
US 5,336,475 · App. 08/099,092
Process for chromium removal using an inorganic sulfur compound
Inventor:
John R. Jackson
Patented Case
View Patent ↗
Granted: Aug 9, 1994
Filed: Jul 28, 1993
Inventor
John R. Jackson
Assignee (at issue)
Huron Tech Corp
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.