Granted Patent
Utility
US 6,360,898 · App. 09/543,485
Filtration device for a waste water treatment system
Inventors:
Harry L. Nurse, Jr., John F. Christensen
Patented Case
View Patent ↗
Granted: Mar 26, 2002
Filed: Apr 6, 2000
Inventors
Harry L. Nurse, Jr.
John F. Christensen
Assignee (at issue)
Harry L. Nurse, Jr.
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.