Granted Patent
Utility
US 5,259,959 · App. 07/782,399
Anoxic ammonia oxidation
Inventor:
Arnold Mulder
Patented Case
View Patent ↗
Granted: Nov 9, 1993
Filed: Oct 25, 1991
Inventor
Arnold Mulder
Assignee (at issue)
Gist-Brocades N.V.
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.