Granted Patent
Utility
US 6,139,740 · App. 09/273,074
Apparatus for improving efficiency of a reverse osmosis system
Inventor:
Robert A. Oklejas
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Mar 19, 1999
Inventor
Robert A. Oklejas
Assignee (at issue)
Pump Engineering, 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.