Granted Patent
Utility
US 6,540,487 · App. 09/833,252
Pressure exchanger with an anti-cavitation pressure relief system in the end covers
Inventors:
Thanos Polizos, Thomas Babcock, Leif J. Hauge, Ragnar A. Hermanstad
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Apr 10, 2001
Inventors
Thanos Polizos
Thomas Babcock
Leif J. Hauge
Ragnar A. Hermanstad
Assignee (at issue)
Energy Recovery, 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.