Granted Patent
Utility
US 6,032,821 · App. 09/089,649
Center opening treatment tank
Inventors:
Bradley S. Martin, Mark E. Wichmann, Andrew J. Kajpust
Patented Case
View Patent ↗
Granted: Mar 7, 2000
Filed: Jun 3, 1998
Inventors
Bradley S. Martin
Mark E. Wichmann
Andrew J. Kajpust
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.