Granted Patent
Utility
US 6,092,671 · App. 09/165,939
Liquid clarification tank
Inventors:
Donald N. Ruehrwein, David K. Wyness, Daniel H. Phillips
Patented Case
View Patent ↗
Granted: Jul 25, 2000
Filed: Oct 2, 1998
Inventors
Donald N. Ruehrwein
David K. Wyness
Daniel H. Phillips
Assignee (at issue)
Chicago Bridge & Iron Co.
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.