Granted Patent
Utility
US 5,437,797 · App. 08/259,764
Mercury removal from waste water
Inventor:
Edward G. Helmig
Patented Case
View Patent ↗
Granted: Aug 1, 1995
Filed: Jun 14, 1994
Inventor
Edward G. Helmig
Assignee (at issue)
Amerimas Home Products, Inc.
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.