Granted Patent
Utility
US 5,641,413 · App. 08/548,921
Removal of nitrogen from wastewaters
Inventors:
Joseph A. Momont, William M. Copa
Patented Case
View Patent ↗
Granted: Jun 24, 1997
Filed: Oct 27, 1995
Inventors
Joseph A. Momont
William M. Copa
Assignee (at issue)
Zimpro Environmental, 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.