Granted Patent
Utility
US 5,908,557 · App. 08/854,834
Process for the removal of pentavalent arsenic from water
Inventors:
Paul Smith, Eugene P. Bergemann
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: May 12, 1997
Inventors
Paul Smith
Eugene P. Bergemann
Assignee (at issue)
NTEC Solutions, 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.