Granted Patent
Utility
US 6,251,283 · App. 09/390,604
Methods for removing selenium from a waste stream
Inventors:
Louis F. Centofanti, Randy Self, Tommy W. Yarbrough
Patented Case
View Patent ↗
Granted: Jun 26, 2001
Filed: Sep 3, 1999
Inventors
Louis F. Centofanti
Randy Self
Tommy W. Yarbrough
Assignee (at issue)
PERMA-FIX ENVIRONMENTAL SERVICES, 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.