Granted Patent
Utility
US 6,589,425 · App. 09/530,621
Method for treating process waste waters highly charged with ammonium in waste water systems
Inventor:
Maximilian Högl
Patented Case
View Patent ↗
Granted: Jul 8, 2003
Filed: Jul 3, 2000
Inventor
Maximilian Högl
Assignee (at issue)
Sud Chemie, 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.