St. Michael, MN (June 2018) – U.S. Water announces that on May 25, 2018, the United States District Court for the Western District of Wisconsin overturned a decision by a unanimous Federal Court jury that U.S. Patent Nos. 8,415,137 and 8,609,399 relating to U.S. Water’s pHytOUT® deposit control technology were valid. U.S. Water plans to appeal the ruling and proceed to defend these patents.

“We are obviously disappointed in the court’s decision.  We continue to believe that U.S. Water’s pHytOUT® deposit control technology is innovative, as borne out by the significant benefits provided to our customers.” said LaMarr Barnes, CEO of U.S. Water.

For more information, contact Todd Emslander, VP Process Technologies at or Sarah Haug, Director of Marketing Communications at

# # #

U.S. Water, an ALLETE company (NYSE: ALE), is an integrated water solutions company headquartered in St. Michael, Minnesota.  U.S. Water provides integrated water solutions for industry and municipalities by combining chemical, equipment, engineering and service for customized solutions to optimize system performance, reduce water and energy usage, and improve efficiency.