Granted Patent
Utility
US 5,378,366 · App. 08/052,025
Hot lime precipitation of arsenic from wastewater or groundwater
Inventor:
Jeffrey H. Yen
Patented Case
View Patent ↗
Granted: Jan 3, 1995
Filed: Apr 22, 1993
Inventor
Jeffrey H. Yen
Assignee (at issue)
Elf Atochem North America, 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.