Granted Patent
Utility
US 6,510,959 · App. 09/551,589
Center opening treatment tank for use with metal tank flanges
Inventor:
John Van Newenhizen
Patented Case
View Patent ↗
Granted: Jan 28, 2003
Filed: Apr 18, 2000
Inventor
John Van Newenhizen
Assignee (at issue)
United States Filter 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.