Granted Patent
Utility
US 6,165,372 · App. 09/372,286
Injection quill for water treatment
Inventors:
Robert R. Ziemer, Anthony M. Rossi
Patented Case
View Patent ↗
Granted: Dec 26, 2000
Filed: Aug 11, 1999
Inventors
Robert R. Ziemer
Anthony M. Rossi
Assignee (at issue)
Betzdearborn, 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.