Granted Patent
Utility
US 6,214,238 · App. 09/122,938
Method for removing selenocyanate ions from waste water
Inventor:
Darrell L. Gallup
Patented Case
View Patent ↗
Granted: Apr 10, 2001
Filed: Jul 27, 1998
Inventor
Darrell L. Gallup
Assignee (at issue)
Tosco 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.