Granted Patent
Utility
US 6,802,980 · App. 10/231,967
Arsenic removal in conjunction with lime softening
Inventors:
Nadim R. Khandaker, Patrick V. Brady, David M. Teter, James L. Krumhansl
Patented Case
View Patent ↗
Granted: Oct 12, 2004
Filed: Aug 30, 2002
Inventors
Nadim R. Khandaker
Patrick V. Brady
David M. Teter
James L. Krumhansl
Assignee (at issue)
Sandia Corporation
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.